# Personal care & health: cheapest per unit, Amazon vs eBay

For things where the brand matters less than the price per ounce or per item, we rank every matching listing by price per unit, ignoring brand. 488 items; last Amazon check 2026-11-13 00:03:11 UTC.

We earn a commission when you buy through these links, at no cost to you.

## Personal care & health

| Item | Amazon | eBay |
|---|---|---|
| [Hand soap refill](https://sharpest.ai/per-unit/hand-soap-refill) | [Amazon $0.070/fl oz →](https://www.amazon.com/dp/B09HHDGQKD?tag=sharpestai-20) | [eBay $0.13/fl oz →](https://sharpest.ai/go/unit/hand-soap-refill/v1%7C880105989740%7C0) |
| [Deodorant](https://sharpest.ai/per-unit/deodorant) | [Amazon $0.74/oz →](https://www.amazon.com/dp/B08ZH9MZGX?tag=sharpestai-20) | [eBay $1.16/oz →](https://sharpest.ai/go/unit/deodorant/v1%7C314697549695%7C0) |
| [Body wash](https://sharpest.ai/per-unit/body-wash) | [Amazon $0.20/fl oz →](https://www.amazon.com/dp/B09M7SPFSJ?tag=sharpestai-20) | [eBay $0.25/fl oz →](https://sharpest.ai/go/unit/body-wash/v1%7C227388738797%7C0) |
| [Bar soap](https://sharpest.ai/per-unit/bar-soap) | [Amazon $0.67/bar →](https://www.amazon.com/dp/B099P4PSKG?tag=sharpestai-20) | [eBay $2.00/bar →](https://sharpest.ai/go/unit/bar-soap/v1%7C860055293278%7C0) |
| [Mouthwash](https://sharpest.ai/per-unit/mouthwash) | [Amazon $0.16/fl oz →](https://www.amazon.com/dp/B00013TQPQ?tag=sharpestai-20) | [eBay $0.25/fl oz →](https://sharpest.ai/go/unit/mouthwash/v1%7C236920963035%7C0) |
| [Cotton swabs](https://sharpest.ai/per-unit/cotton-swabs) | [Amazon $0.005/swab →](https://www.amazon.com/dp/B09541P9WH?tag=sharpestai-20) | [eBay $0.011/swab →](https://sharpest.ai/go/unit/cotton-swabs/v1%7C237073108401%7C0) |
| [Cotton balls](https://sharpest.ai/per-unit/cotton-balls) | [Amazon $0.007/ball →](https://www.amazon.com/dp/B07K31B59G?tag=sharpestai-20) | [eBay $0.060/ball →](https://sharpest.ai/go/unit/cotton-balls/v1%7C377395222313%7C0) |
| [Shaving cream](https://sharpest.ai/per-unit/shaving-cream) | [Amazon $0.27/oz →](https://www.amazon.com/dp/B00MW3AIHI?tag=sharpestai-20) | [eBay $0.75/oz →](https://sharpest.ai/go/unit/shaving-cream/v1%7C366797227312%7C0) |
| [Contact lens solution](https://sharpest.ai/per-unit/contact-lens-solution) | [Amazon $0.75/fl oz →](https://www.amazon.com/dp/B010GD3NUY?tag=sharpestai-20) | [eBay $1.02/fl oz →](https://sharpest.ai/go/unit/contact-lens-solution/v1%7C227550442404%7C0) |
| [Manual toothbrushes](https://sharpest.ai/per-unit/manual-toothbrushes) | [Amazon $1.45/brush →](https://www.amazon.com/dp/B073HC7WHW?tag=sharpestai-20) | [eBay $0.75/brush →](https://sharpest.ai/go/unit/manual-toothbrushes/v1%7C920036398709%7C0) |
| [Hand sanitizer](https://sharpest.ai/per-unit/hand-sanitizer) | [Amazon $0.18/fl oz →](https://www.amazon.com/dp/B0FXNPSC7K?tag=sharpestai-20) | [eBay $0.50/fl oz →](https://sharpest.ai/go/unit/hand-sanitizer/v1%7C227605269697%7C0) |
| [Adhesive bandages](https://sharpest.ai/per-unit/adhesive-bandages) | [Amazon $0.090/bandage →](https://www.amazon.com/dp/B00006IDL6?tag=sharpestai-20) | [eBay $0.074/bandage →](https://sharpest.ai/go/unit/adhesive-bandages/v1%7C820252484829%7C0) |
| [Baby wipes](https://sharpest.ai/per-unit/baby-wipes) | [Amazon $0.010/wipe →](https://www.amazon.com/dp/B0CNSCVGPH?tag=sharpestai-20) | [eBay $0.015/wipe →](https://sharpest.ai/go/unit/baby-wipes/v1%7C377460502572%7C0) |
| [Diapers size 4](https://sharpest.ai/per-unit/diapers-size-4) | [Amazon $0.095/diaper →](https://www.amazon.com/dp/B0DQRDDM76?tag=sharpestai-20) | [eBay $0.19/diaper →](https://sharpest.ai/go/unit/diapers-size-4/v1%7C287709426390%7C0) |
| [Multivitamin](https://sharpest.ai/per-unit/multivitamin) | [Amazon $0.058/tablet →](https://www.amazon.com/dp/B00YMSLT88?tag=sharpestai-20) | [eBay $0.065/tablet →](https://sharpest.ai/go/unit/multivitamin/v1%7C800368399793%7C0) |
| [Melatonin](https://sharpest.ai/per-unit/melatonin) | [Amazon $0.028/tablet →](https://www.amazon.com/dp/B000GG6D9A?tag=sharpestai-20) | [eBay $0.040/tablet →](https://sharpest.ai/go/unit/melatonin/v1%7C366652923197%7C0) |
| [Vitamin C 1000 mg](https://sharpest.ai/per-unit/vitamin-c-1000-mg) | [Amazon $0.045/tablet →](https://www.amazon.com/dp/B07122C9VC?tag=sharpestai-20) | [eBay $0.040/tablet →](https://sharpest.ai/go/unit/vitamin-c-1000-mg/v1%7C197036082634%7C0) |
| [Creatine monohydrate](https://sharpest.ai/per-unit/creatine-monohydrate) | [Amazon $0.62/oz →](https://www.amazon.com/dp/B0DX7846R5?tag=sharpestai-20) | [eBay $0.68/oz →](https://sharpest.ai/go/unit/creatine-monohydrate/v1%7C277881404127%7C0) |
| [Lip balm](https://sharpest.ai/per-unit/lip-balm) | [Amazon $1.33/stick →](https://www.amazon.com/dp/B0044B4HSM?tag=sharpestai-20) | [eBay $1.11/stick →](https://sharpest.ai/go/unit/lip-balm/v1%7C293417587859%7C0) |
| [Tampons](https://sharpest.ai/per-unit/tampons) | [Amazon $0.078/tampon →](https://www.amazon.com/dp/B077NHF4FS?tag=sharpestai-20) | [eBay $0.18/tampon →](https://sharpest.ai/go/unit/tampons/v1%7C285042740107%7C0) |
| [Pads](https://sharpest.ai/per-unit/pads) | [Amazon $0.069/pad →](https://www.amazon.com/dp/B0BG3HGFWW?tag=sharpestai-20) | — |
| [Condoms](https://sharpest.ai/per-unit/condoms) | [Amazon $0.24/condom →](https://www.amazon.com/dp/B0CD85PD5K?tag=sharpestai-20) | [eBay $0.30/condom →](https://sharpest.ai/go/unit/condoms/v1%7C385640935374%7C0) |
| [Disposable razors](https://sharpest.ai/per-unit/disposable-razors) | [Amazon $0.16/razor →](https://www.amazon.com/dp/B0BTMQ4CD3?tag=sharpestai-20) | [eBay $0.47/razor →](https://sharpest.ai/go/unit/disposable-razors/v1%7C325796204116%7C0) |
| [Makeup remover wipes](https://sharpest.ai/per-unit/makeup-remover-wipes) | [Amazon $0.12/wipe →](https://www.amazon.com/dp/B0BWVFJ8CT?tag=sharpestai-20) | [eBay $0.14/wipe →](https://sharpest.ai/go/unit/makeup-remover-wipes/v1%7C257676825128%7C0) |
| [Face wash](https://sharpest.ai/per-unit/face-wash) | [Amazon $0.62/fl oz →](https://www.amazon.com/dp/B00JFV5X3E?tag=sharpestai-20) | [eBay $1.00/fl oz →](https://sharpest.ai/go/unit/face-wash/v1%7C800766539543%7C0) |
| [Face moisturizer](https://sharpest.ai/per-unit/face-moisturizer) | [Amazon $2.68/fl oz →](https://www.amazon.com/dp/B0C9L29ZYS?tag=sharpestai-20) | [eBay $7.79/fl oz →](https://sharpest.ai/go/unit/face-moisturizer/v1%7C178558381142%7C0) |
| [Probiotics](https://sharpest.ai/per-unit/probiotics) | [Amazon $0.52/capsule →](https://www.amazon.com/dp/B08Y66H6B7?tag=sharpestai-20) | [eBay $5.09/capsule →](https://sharpest.ai/go/unit/probiotics/v1%7C800866397193%7C0) |
| [Fiber supplement](https://sharpest.ai/per-unit/fiber-supplement) | — | [eBay $0.39/oz →](https://sharpest.ai/go/unit/fiber-supplement/v1%7C920084913420%7C0) |
| [Cough drops](https://sharpest.ai/per-unit/cough-drops) | [Amazon $0.030/drop →](https://www.amazon.com/dp/B0937TMQGV?tag=sharpestai-20) | [eBay $0.046/drop →](https://sharpest.ai/go/unit/cough-drops/v1%7C287093413615%7C0) |
| [Lubricant eye drops](https://sharpest.ai/per-unit/lubricant-eye-drops) | [Amazon $11.94/fl oz →](https://www.amazon.com/dp/B09B8V5X73?tag=sharpestai-20) | [eBay $20.70/fl oz →](https://sharpest.ai/go/unit/lubricant-eye-drops/v1%7C313729342277%7C0) |
| [Plant protein powder](https://sharpest.ai/per-unit/plant-protein-powder) | [Amazon $0.55/oz →](https://www.amazon.com/dp/B0GL3L83HZ?tag=sharpestai-20) | [eBay $0.62/oz →](https://sharpest.ai/go/unit/plant-protein-powder/v1%7C335428742526%7C0) |
| [Collagen peptides](https://sharpest.ai/per-unit/collagen-peptides) | [Amazon $1.43/oz →](https://www.amazon.com/dp/B06XKM7P97?tag=sharpestai-20) | [eBay $0.52/oz →](https://sharpest.ai/go/unit/collagen-peptides/v1%7C820338699042%7C0) |
| [Toothpaste](https://sharpest.ai/per-unit/toothpaste) | [Amazon $1.66/tube →](https://www.amazon.com/dp/B01BNEWDFQ?tag=sharpestai-20) | [eBay $2.00/tube →](https://sharpest.ai/go/unit/toothpaste/v1%7C398250010449%7C0) |
| [Dental floss](https://sharpest.ai/per-unit/dental-floss) | [Amazon $0.009/ft →](https://www.amazon.com/dp/B0DN1S2C5K?tag=sharpestai-20) | [eBay $0.011/ft →](https://sharpest.ai/go/unit/dental-floss/v1%7C298339363028%7C0) |
| [Floss picks](https://sharpest.ai/per-unit/floss-picks) | [Amazon $0.021/pick →](https://www.amazon.com/dp/B0FS6C82BV?tag=sharpestai-20) | [eBay $0.027/pick →](https://sharpest.ai/go/unit/floss-picks/v1%7C147626054753%7C0) |
| [Electric toothbrush heads](https://sharpest.ai/per-unit/electric-toothbrush-heads) | [Amazon $2.49/head →](https://www.amazon.com/dp/B0CDMBD6P7?tag=sharpestai-20) | [eBay $1.05/head →](https://sharpest.ai/go/unit/electric-toothbrush-heads/v1%7C127973627339%7C0) |
| [Razor blade refills](https://sharpest.ai/per-unit/razor-blade-refills) | [Amazon $1.40/cartridge →](https://www.amazon.com/dp/B07MK1N7P6?tag=sharpestai-20) | [eBay $1.02/cartridge →](https://sharpest.ai/go/unit/razor-blade-refills/v1%7C324380960051%7C0) |
| [Sunscreen SPF 30+](https://sharpest.ai/per-unit/sunscreen-spf-30) | [Amazon $1.25/fl oz →](https://www.amazon.com/dp/B0031O5QF6?tag=sharpestai-20) | [eBay $3.80/fl oz →](https://sharpest.ai/go/unit/sunscreen-spf-30/v1%7C960127235537%7C0) |
| [Body lotion](https://sharpest.ai/per-unit/body-lotion) | [Amazon $0.30/fl oz →](https://www.amazon.com/dp/B0BLY1CWJ4?tag=sharpestai-20) | [eBay $0.59/fl oz →](https://sharpest.ai/go/unit/body-lotion/v1%7C227487578188%7C0) |
| [Shampoo](https://sharpest.ai/per-unit/shampoo) | [Amazon $0.17/fl oz →](https://www.amazon.com/dp/B00DQSHTWK?tag=sharpestai-20) | — |
| [Conditioner](https://sharpest.ai/per-unit/conditioner) | [Amazon $0.12/fl oz →](https://www.amazon.com/dp/B0FQQZ39GH?tag=sharpestai-20) | — |
| [Dry shampoo](https://sharpest.ai/per-unit/dry-shampoo) | [Amazon $5.17/can →](https://www.amazon.com/dp/B01BPHF3Y4?tag=sharpestai-20) | — |
| [Alcohol prep pads](https://sharpest.ai/per-unit/alcohol-prep-pads) | [Amazon $0.011/pad →](https://www.amazon.com/dp/B00PB428AK?tag=sharpestai-20) | [eBay $0.020/pad →](https://sharpest.ai/go/unit/alcohol-prep-pads/v1%7C398091426574%7C0) |
| [Vitamin D3 2000 IU](https://sharpest.ai/per-unit/vitamin-d3-2000-iu) | [Amazon $0.019/softgel →](https://www.amazon.com/dp/B0FS81N5CM?tag=sharpestai-20) | [eBay $0.023/softgel →](https://sharpest.ai/go/unit/vitamin-d3-2000-iu/v1%7C407351333732%7C0) |
| [Vitamin D3 1000 IU](https://sharpest.ai/per-unit/vitamin-d3-1000-iu) | [Amazon $0.028/softgel →](https://www.amazon.com/dp/B0G7L2TSF7?tag=sharpestai-20) | [eBay $0.026/softgel →](https://sharpest.ai/go/unit/vitamin-d3-1000-iu/v1%7C127958757974%7C0) |
| [Fish oil omega-3](https://sharpest.ai/per-unit/fish-oil-omega-3) | [Amazon $0.15/softgel →](https://www.amazon.com/dp/B07L45XQBR?tag=sharpestai-20) | [eBay $0.050/softgel →](https://sharpest.ai/go/unit/fish-oil-omega-3/v1%7C147489969913%7C0) |
| [Magnesium glycinate](https://sharpest.ai/per-unit/magnesium-glycinate) | [Amazon $0.100/capsule →](https://www.amazon.com/dp/B000BD0RT0?tag=sharpestai-20) | [eBay $0.052/capsule →](https://sharpest.ai/go/unit/magnesium-glycinate/v1%7C277935897418%7C0) |
| [Antacid chewables](https://sharpest.ai/per-unit/antacid-chewables) | [Amazon $0.055/tablet →](https://www.amazon.com/dp/B00SW0HRRE?tag=sharpestai-20) | [eBay $0.062/tablet →](https://sharpest.ai/go/unit/antacid-chewables/v1%7C397264809893%7C0) |
| [Omeprazole 20 mg](https://sharpest.ai/per-unit/omeprazole-20-mg) | [Amazon $0.20/tablet →](https://www.amazon.com/dp/B0D87PKKC3?tag=sharpestai-20) | [eBay $0.17/tablet →](https://sharpest.ai/go/unit/omeprazole-20-mg/v1%7C318760951309%7C0) |
| [Ibuprofen 200 mg](https://sharpest.ai/per-unit/ibuprofen-200-mg) | [Amazon $0.016/tablet →](https://www.amazon.com/dp/B07R1DMNK4?tag=sharpestai-20) | [eBay $0.020/tablet →](https://sharpest.ai/go/unit/ibuprofen-200-mg/v1%7C205407270362%7C0) |
| [Acetaminophen 500 mg](https://sharpest.ai/per-unit/acetaminophen-500-mg) | [Amazon $0.020/tablet →](https://www.amazon.com/dp/B0FZNCQYMH?tag=sharpestai-20) | [eBay $0.027/tablet →](https://sharpest.ai/go/unit/acetaminophen-500-mg/v1%7C127406732976%7C0) |
| [Loratadine 10 mg](https://sharpest.ai/per-unit/loratadine-10-mg) | [Amazon $0.020/tablet →](https://www.amazon.com/dp/B0FHYJRK1T?tag=sharpestai-20) | [eBay $0.029/tablet →](https://sharpest.ai/go/unit/loratadine-10-mg/v1%7C297422693519%7C594890442575) |
| [Cetirizine 10 mg](https://sharpest.ai/per-unit/cetirizine-10-mg) | [Amazon $0.020/tablet →](https://www.amazon.com/dp/B0GRJR7431?tag=sharpestai-20) | [eBay $0.031/tablet →](https://sharpest.ai/go/unit/cetirizine-10-mg/v1%7C900015671088%7C0) |

Amazon: item price (Amazon's own, else lowest new offer) before shipping and tax, via Keepa; accurate as of the time shown and subject to change. eBay: new Buy It Now listings from US sellers, item plus shipping, checked daily. Unit counts come from the listing data or title. As an Amazon Associate and eBay Partner, Sharpest earns from qualifying purchases.

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As of 2026-11-13. Canonical page: https://sharpest.ai/per-unit/c/personal-care-health