# QSFP+ 40G SR4 optic price tracker As of Nov 6, 2026, QSFP+ 40G SR4 optic on eBay: used listings start at $7.99 (median $16.57); new from $13.49; refurb from $18.99. Is $7.99 a good Black Friday price for the QSFP+ 40G SR4 optic? Across the 13 days we checked since Oct 24, its lowest eBay listing was $7.99 and the median listing was $19.93. Today's low is at that low. [Black Friday check →](https://sharpest.ai/black-friday) [See the cheapest QSFP+ 40G SR4 optic on eBay (used) — $7.99 →](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C256890346375%7C0) [New from **$13.49**](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C227588690707%7C0)[Used from **$7.99**](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C256890346375%7C0) Far below the other listings: check the seller, photos and condition before buying. [Compare new on Amazon →](https://www.amazon.com/s?k=qsfp%2B+40g+sr4&tag=sharpestai-20) As an eBay Partner and Amazon Associate we earn from qualifying purchases, at no cost to you. Lowest now**$7.99** Typical (median)**$19.99** 7 days** ▲ 1.0%** 30 days** —** Live listings**142Buy or wait?** Fair price: today's low is within 0% of its 18-day average. ## Cheapest QSFP+ 40G SR4 optic listings right now | | Listing | Condition | Price + ship | | |---|---|---|---|---| | | Cisco QSFP-40G-SR4-S Transciever, 1 Year Warranty Buy It Now offers | Used | $7.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C256890346375%7C0) | | | Finisar FTL410QE2C-G1 QSFP-40G-SR4 40GBASE-SR4 40G QSFP+ MPO Optical Transceiver Buy It Now offers | Used | $7.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C326496551981%7C0) | | | Juniper Compatible QFX-QSFP-40G-SR4-NFS 40Gbase SR4 850nm 150m QSFP Transceiver Buy It Now offers | Used | $7.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C327090614862%7C0) | | | Juniper Networks GENUINE, QFX-QSFP-40G-SR4 QSFP+ 40 Gigabit **1 YEAR WARRANTY** Buy It Now offers | Used | $8.50 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C276379636873%7C0) | | | Genuine Cisco QSFP-40G-SR4 40G SR Transceiver Module Buy It Now | Used | $8.50 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C318600948416%7C0) | | | 40G-QSFP-SR4 40G-QSFP-SR4-PRO PROLINE 40Gb QSFP Buy It Now offers | Used | $8.58 | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C820082938937%7C0) | | | Finisar Original FTL410QE4C QSFP- 40G-SR4 QSFP+ Multi Mode Transceiver Buy It Now offers | Used | $8.95 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C286861934555%7C0) | | | Finisar FTL410QE2C QSFP-40G-SR4 Optical Transceiver Module Used Buy It Now offers | Used | $8.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C187735143506%7C0) | | | Cisco Original QSFP-40G-SR4-S 40GBase SR4-S Optical Transceiver Buy It Now | Used | $8.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C318600918266%7C0) | | | Finisar FTL410QE2C QSFP-40G-SR4 Buy It Now | Used | $9.00 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C358716576119%7C0) | | | Juniper QFX-QSFP-40G-SR4 QSFP+ 40 Gigabit, 1 Year Warranty Buy It Now offers | Used | $9.75 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C256455197893%7C0) | | | Cisco QSFP-40G-SR4 40GBase-SR4 QSFP+, 1 Year Warranty Buy It Now offers | Used | $9.75 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C257530013567%7C0) | | | CISCO QSFP-40G-SR4-S 40GBASE-SR4-S 850 nm MMF QSFP Module Cisco 10-3090-02 Buy It Now | Used | $9.89 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C405833645764%7C0) | | | QSFP-40G-SR4-S CISCO 40GBASE-SR4-S 850 nm MMF QSFP Module Buy It Now offers | Used | $9.90 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C177071692082%7C0) | | | Genuine HP JG325B X140 40G QSFP+ MPO SR4 Transceiver FTL410QE2C-HZ Buy It Now offers | Used | $9.90 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C182645742622%7C0) | | | Cisco Original QSFP-40G-SR4-S 40GBase SR4-S Optical Transceiver 100+ in stock Buy It Now offers | Used | $9.95 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C227243799269%7C0) | | | Genuine Cisco QSFP-40G-SR4 QSFP TRANSCEIVER MODULE Buy It Now offers | Used | $10.49 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C296826953263%7C0) | | | FINISAR FTL410QE4C QSFP- 40G-SR4 QSFP+ Multi Mode Transceiver Module Buy It Now offers | Used | $11.95 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C187406034109%7C0) | | | JG325B HPE X140 40G QSFP+ MPO SR4 Transceiver **New Other** Buy It Now offers | Open box | $11.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C227588690829%7C0) | | | Precision QSFP-SR4-AJ QSFP 40G SR4 MMF 850nm TR-QQ85X-NPT Transceiver Buy It Now offers | Used | $11.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C326609887444%7C0) | | | FS QSFP-SR4-40G 40G QSFP+ 850NM 150M TRANCIEVER Buy It Now offers | Used | $12.00 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C178204761380%7C0) | | | Cisco 40G SR QSFP+ Transceiver Optic Module QSFP-40G-SR4 10-2672-03 Buy It Now offers | Used | $12.00 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C286990099154%7C0) | | | Cisco QSFP-40G-SR4-S Transceiver 40GBASE-SR4-S MMF QSFP Module 10-3090-02 Buy It Now offers | Used | $12.00 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C287706541212%7C0) | | | FS QSFP-SR4-40G 40GBASE Duplex LC 150m MMF QSFP+ Transceiver Module Optic Buy It Now offers | Used | $12.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C326609460506%7C0) | | | X 5 Finisar FTL410QE2C-G1 QSFP-40G-SR4 40GBASE-SR4 40G QSFP+ MPO Transceiver Buy It Now offers | Used | $12.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C326617292994%7C0) | | | Finisar FTL410QE2C 40BASE-SR4 150m Gen2 QSFP+ transceiver QSFP-40G-SR4 Buy It Now offers | Used | $13.11 sale: was $19.00, −31% free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C157459680299%7C0) | | | HPE X140 40G QSFP+ MPO SR4 Transceiver JG325B **New Open Box** Buy It Now offers | New | $13.49 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C227588690707%7C0) | | | Brocade 40GE E40G-QSFP-SR4 QSFP 100m Transceiver Module 57-1000128-01 Buy It Now | Used | $13.58 free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C137832889176%7C0) | | | Genuine Cisco QSFP-40G-SR4 40G-Base QSFP+ Transceiver Module Buy It Now offers | Used | $13.68 | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C227183796766%7C0) | | | Finisar FTL410QE2C-E5 QSFP-40G-SR4 EMC 019-078-046 Optical Tranciever Buy It Now offers | Used | $13.80 sale: was $20.00, −31% free ship | [View on eBay](https://sharpest.ai/go/homelab/qsfp-40g-sr4/v1%7C157459677579%7C0) | ## Recent auctions: last bid seen The last bid we saw before each auction ended, shipping included. This is **not a confirmed sale price**: bids in the final minutes are missed, and an auction can end unsold or below a reserve. | Ended | Last bid seen | Bids | Seen before end | |---|---|---|---| | 2026-11-01 | $3,409 | 0 | 8h | ## Get a price-drop alert We'll email you when a QSFP+ 40G SR4 optic listing hits your price. One email per drop, unsubscribe in one click. By continuing you agree to our [Terms](https://sharpest.ai/terms) and [Privacy Policy](https://sharpest.ai/privacy). ## Where today's prices sit 142 live listings by price (item + shipping). The highlighted bar is the cheapest band. ## Price history typical asking price lowest asking price ## Market read Of 142 Buy It Now listings, 88 used (from $7.99), 51 new (from $13.49), 3 refurb (from $18.99). The cheapest used copy is 41% below the cheapest new one. 76% ship free; the rest add $6.74 shipping at the median. The middle half of asking prices runs $14.99 to $41.40, so anything under $14.99 is in the cheapest quarter. Lowest we have recorded since 2026-10-19: $7.99 on 2026-10-19 — today matches it. Asking prices of US eBay listings including shipping, as of 2026-11-05 (checked twice a day); we earn a commission on purchases through these links; parts, broken units and accessories are filtered out. [How we price](https://sharpest.ai/about#method). ## Head to head - [QSFP+ 40G SR4 optic vs 10GBASE-SR SFP+ transceiver](https://sharpest.ai/homelab/vs/qsfp-40g-sr4-vs-sfp-plus-10g-sr) - [QSFP+ 40G SR4 optic vs 10G SFP+ DAC 3m](https://sharpest.ai/homelab/vs/qsfp-40g-sr4-vs-sfp-plus-dac-3m) ## Compare - [10GBASE-SR SFP+ transceiver](https://sharpest.ai/homelab/sfp-plus-10g-sr) $5.89 - [10G SFP+ DAC 1m](https://sharpest.ai/homelab/sfp-plus-dac-1m) $13.13 - [10G SFP+ DAC 3m](https://sharpest.ai/homelab/sfp-plus-dac-3m) $14.50 - [QSFP28 100G SR4 optic](https://sharpest.ai/homelab/qsfp28-100g-sr4) $28.80 - [SFP28 25G SR optic](https://sharpest.ai/homelab/sfp28-25g-sr) $32.95 --- As of 2026-11-06. Canonical page: https://sharpest.ai/homelab/qsfp-40g-sr4