# HPE 500W Flex Slot Platinum PSU (720478-B21) price tracker As of Nov 6, 2026, HPE 500W Flex Slot Platinum PSU (720478-B21) on eBay: used listings start at $14.89 (median $34.88); new from $99.99. [See the cheapest HPE 500W Flex Slot Platinum PSU (720478-B21) on eBay (used) — $14.89 →](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C235904126500%7C0) [New from **$99.99**](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C267111003204%7C0)[Used from **$14.89**](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C235904126500%7C0) Far below the other listings: check the seller, photos and condition before buying. [Compare new on Amazon →](https://www.amazon.com/s?k=hpe+720478-b21+500w&tag=sharpestai-20) As an eBay Partner and Amazon Associate we earn from qualifying purchases, at no cost to you. Lowest now**$14.89** Typical (median)**$36.39** 7 days** —** 30 days** —** Live listings**25Buy or wait?** Tracking began 2026-11-05, so there isn't enough history for a buy/wait call yet. Today the cheapest clean listing is 59% under the typical one. ## Cheapest HPE 500W Flex Slot Platinum PSU (720478-B21) listings right now | | Listing | Condition | Price + ship | | |---|---|---|---|---| | | 720478-B21 HP 500W Flex Slot Platinum Power Supply Kit 723594-001 754377-001 Buy It Now offers | Used | $14.89 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C235904126500%7C0) | | | HPE 754377-001 Gen9 Gen10 500W FS 80+ Platinum Hot Plug Power Supply 720478-B21 Buy It Now | Used | $14.94 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C137846854466%7C0) | | | 754377-001 723594-001 720478-B21 HPE 500W 80+ PLATINUM HOT PLUG POWER SUPPLY Buy It Now offers | Used | $14.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C127096546957%7C0) | | | HP 500w 80+ Platinum PSU HSTNS-PL40 723594-001 723595-201 754377-001 720478-B21 Buy It Now offers | Used | $15.00 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C116904455063%7C0) | | | HPE 500W Power Supply 754377-001 723595-101 HSTNS-PD40 DL380 DL360 Gen9 Gen10 Buy It Now | Used | $23.59 | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C158174741984%7C0) | | | HP 500W PSU 720478-B21 754377-001 Gen9 Flex Slot Platinum Hot-Plug Buy It Now offers | Used | $25.00 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C122381641947%7C0) | | | 720478-B21 I HP 500W Flex Slot Platinum Hot Plug Power Supply 754377-001 Buy It Now offers | Used | $25.00 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C127623914623%7C0) | | | HP 500W Server Power Supply DL380 ML350T G9 723595-501 723594-001 720478-B21 Buy It Now offers | Used | $25.92 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C224420019187%7C0) | | | HPe DL360 G9 500w Platinum PSU 723594-001 723595-101 754377-001 720478-B21 Buy It Now | Used | $26.72 | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C364303606952%7C0) | | | HP Gen9 500W Flex Slot Platinum Hot-Plug PSU Kit 720478-B21 754377-001 Buy It Now offers | Used | $27.00 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C381989843229%7C0) | | | 720478-B21/754377-001/723595-101/723594-001-DPS-500AB-13A/HP500W FS POWER SUPPLY Buy It Now offers | Used | $31.19 sale: was $59.99, −48% free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C233676460062%7C0) | | | HPE 500W 80+ Platinum PSU 754377-001 720478-B21 ProLiant DL360 ML350 Gen9 Buy It Now offers | Open box | $34.88 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C188935815918%7C0) | | | 720478-B21/754377-001/723595-501/723594-001/HSTNS-PC40-HP 500W FS POWER SUPPLY Buy It Now offers | Open box | $36.39 sale: was $69.99, −48% free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C233676475680%7C0) | | | HPE 500W Flex Slot Platinum Hot Plug Power Supply 754377-001 723594-001 Gen9 Buy It Now offers | Used | $36.64 | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C800562647940%7C0) | | | HPE 754377-001 723594-001 720478-B21 500W Platinum Redundant Power Supply PSU Buy It Now offers | Used | $39.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C123991998980%7C0) | | | HPE 723594-001 500W Flex Slot Platinum Hot Plug Power Supply for DL360 G9 Buy It Now offers | Used | $45.00 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C358383828133%7C0) | | | HPE 500W 80 PLUS Platinum PSU HSTNS-PD40 720478-B21 754377-001 Buy It Now offers | Used | $51.00 | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C236599214623%7C0) | | | HP 720478-B21 500W Power Supply Kit Buy It Now offers | Used | $51.26 | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C156607709940%7C0) | | | HP 720478-B21 500W Flex Slot Power Supply Kit for ProLiant G9 Buy It Now offers | Open box | $64.98 | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C277399958572%7C0) | | | HPE 720478-B21 NEW 500W Flex-Slot Platinum Power Supply for DL380 360 ML350 G9 Buy It Now offers | Open box | $70.42 sale: was $88.03, −20% free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C235860706818%7C0) | | | HPE 720478-B21 500W Flex-Slot Platinum Power Supply for DL380 G9 360 G9 ML350 G9 Buy It Now offers | Used | $74.73 sale: was $93.41, −20% free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C335715317903%7C0) | | | 720478-B21 I HP 500W Flex Slot Platinum HotPlug Power Supply 754377-001 OPEN BOX Buy It Now offers | Open box | $85.00 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C127888657349%7C0) | | | HP HPE 500W FS Plat Hot plug power supply kit 500 Watt Platinum Power supply 720 Buy It Now | New | $99.99 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C267111003204%7C0) | | | HP 754377-001 Gen9 500W Flex Slot Platinum Hot Plug Power Supply PSU NEW SEALED Buy It Now offers | New | $116 | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C327406584459%7C0) | | | NEW HP 720478-B21 500W FLEX SLOT PLATINUM HP POWER SUPPLY Buy It Now offers | Open box | $200 free ship | [View on eBay](https://sharpest.ai/go/homelab/hpe-500w-flex-slot-psu/v1%7C222086071245%7C0) | ## Get a price-drop alert We'll email you when a HPE 500W Flex Slot Platinum PSU (720478-B21) 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 25 live listings by price (item + shipping). The highlighted bar is the cheapest band. Price history starts 2026-11-05 — the chart appears after the second daily snapshot. ## Market read Of 25 Buy It Now listings, 23 used (from $14.89), 2 new (from $99.99). The cheapest used copy is 85% below the cheapest new one. 72% ship free; the rest add $9.99 shipping at the median. The middle half of asking prices runs $25.00 to $64.98, so anything under $25.00 is in the cheapest quarter. Lowest we have recorded since 2026-11-05: $14.89 on 2026-11-05 — 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 - [HPE 500W Flex Slot Platinum PSU (720478-B21) vs Dell iDRAC7 Enterprise card](https://sharpest.ai/homelab/vs/dell-idrac7-enterprise-vs-hpe-500w-flex-slot-psu) - [HPE 500W Flex Slot Platinum PSU (720478-B21) vs Dell R640/R740 750W PSU](https://sharpest.ai/homelab/vs/dell-r740-psu-750w-vs-hpe-500w-flex-slot-psu) ## Compare - [Dell R620/R720 750W PSU](https://sharpest.ai/homelab/dell-r720-psu-750w) $17.99 - [Dell iDRAC7 Enterprise card](https://sharpest.ai/homelab/dell-idrac7-enterprise) $14.49 - [Dell R620/R720 1100W PSU](https://sharpest.ai/homelab/dell-r720-psu-1100w) $19.95 - [Dell R630/R730 750W PSU](https://sharpest.ai/homelab/dell-r730-psu-750w) $12.89 - [Dell R640/R740 750W PSU](https://sharpest.ai/homelab/dell-r740-psu-750w) $16.95 - [Dell R640/R740 1100W PSU](https://sharpest.ai/homelab/dell-r740-psu-1100w) $1,285 - [HPE 800W Flex Slot Platinum PSU (720479-B21)](https://sharpest.ai/homelab/hpe-800w-flex-slot-psu) $24.95 - [HPE 96W Smart Storage Battery (727258-B21)](https://sharpest.ai/homelab/hpe-727258-smart-storage-battery) $31.92 - [HPE 96W Smart Storage Battery (P01366-B21)](https://sharpest.ai/homelab/hpe-p01366-smart-storage-battery) $23.98 - [Dell 2.5in drive tray (R620/R720/R630/R730)](https://sharpest.ai/homelab/dell-12g-2-5-tray) $4.99 --- As of 2026-11-06. Canonical page: https://sharpest.ai/homelab/hpe-500w-flex-slot-psu