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used mini pcs

HP · 2020

HP ProDesk 400 G6 Desktop Mini

The ProDesk 400 G6 Desktop Mini is HP's entry-level 10th-gen (Comet Lake) 1-liter PC, sold alongside the ProDesk 600 G6 and EliteDesk 800 G6. Used units usually carry 35 W T-series chips like the Core i5-10500T, so you get six Hyper-Threaded cores in the same small chassis. It's the cheaper branch of the family: secondary sources list a single M.2 NVMe slot plus a 2.5-inch bay rather than the 600/800 G6's two M.2 slots, and STH found HP's 2.5 GbE Flex IO module doesn't work in it. That makes it a fine Home Assistant, Pi-hole or light Docker box, but if you want dual NVMe, Intel AMT or a 2.5 GbE upgrade, look at the 600 G6 or 800 G6 instead.

Good for

Badges come from the spec rules on each use page, not from guesswork.

HP ProDesk 400 G6 Desktop Mini in black, three-quarter front view showing the grooved vents, hp logo, PRODESK lettering, USB-C and two USB-A ports, headset jack and power button
Representative photo — AI-generated from real seller photos. Individual listings vary. How we make these →

Specs that matter used

CPU generation
Intel 10th Gen (Comet Lake / Ice Lake)
CPU options
Core i5-10500T, Core i3-10100T, Core i7-10700T
Form factor
1-liter business mini
Released
2020
Memory
DDR4 SO-DIMM, 2 slots
Storage
1× M.2 PCIe x4 NVMe + 1× 2.5-inch SATA bay (per hardware-corner)
Ethernet
1 × 1 GbE (STH found the HP Flex IO V2 2.5 GbE module did not work in a ProDesk 400 G6)
Wi-Fi
M.2 2230 slot for an optional Wi-Fi + Bluetooth card
vPro / AMT
No
Cooling
Fan-cooled
Power adapter
HP external 19.5 V adapter; hardware-corner lists 65 W
Windows 11
CPU generation is on Microsoft's supported list
Spec sources

Check before you buy

General off-lease checks (BIOS passwords, Computrace, missing drive caddies) are in the used mini PC buying checklist.

Buying guide

Which one to buy

Oct 4, 2026

54 ProDesk 400 G6 Minis are listed, and most complete units run $200–340 delivered, with an i5-10500T, 8 GB, a 256 GB SSD, Windows and the adapter from about $190. It's the lower-tier G6 with one NVMe slot, and HP's 2.5 GbE Flex IO module didn't work in one when ServeTheHome tried it, so treat it as a 1 GbE box. Get the exact CPU from the title, confirm there's no BIOS password, and skip copied titles from several sellers and asks near double the median.

Listed now
54
For parts
0
Typical ask
$200–$340
Full range
$150–$547

Snapshot

Live on eBay right now

8 of 54 listed

Snapshot captured — listings may have ended

Delivered prices include shipping as eBay quoted it to a US address on Oct 4, 2026. Many sellers charge by distance, so your total may differ; eBay shows your exact total before you buy.

Prices and availability change daily. The full, current search on eBay shows every matching listing, including new ones since Oct 4, 2026.

See all current listings on eBay ↗eBay search

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