58 models · specs checked against manufacturer sheets
Buy the right used mini PC for the job.
Off-lease ThinkCentre Tiny, OptiPlex Micro and EliteDesk Mini boxes, and modern Beelink, GMKtec and Minisforum minis, make quiet, frugal always-on computers. We tell you what each one really has inside, what to check before you buy, and what it can run: AI agents, Home Assistant, Proxmox, Plex and more.
- Specs from manufacturer spec sheets
- Plain eBay links: we earn nothing from them
- Prices only from dated eBay snapshots
What will you run on it?
Pick the job, we’ll show the boxes that fit
- AI agent serverRun Claude Code, agent SDK jobs, browser automation and MCP servers 24/7 at home, for the cost of a few watts.36 models fit →
- Local LLMOllama, llama.cpp and Open WebUI on CPU or iGPU: what fits in 16, 32 and 64 GB, and when you need a GPU instead.33 models fit →
- Home AssistantHome Assistant OS on bare metal or in a VM, with Zigbee and Z-Wave sticks and Node-RED.51 models fit →
- n8n / automationSelf-host n8n, Node-RED and cron jobs as a no-monthly-fee alternative to Zapier.47 models fit →
- Proxmox homelabRun everything here as VMs and containers on one box, with vPro remote management and room for RAM.40 models fit →
- Frigate NVRLocal camera AI with Frigate, OpenVINO on the Intel iGPU, or a Coral, plus Quick Sync decoding.31 models fit →
- Plex / JellyfinPlex and Jellyfin with Quick Sync hardware transcoding, by CPU generation.26 models fit →
- Network servicesPi-hole or AdGuard Home, WireGuard or Tailscale, and a reverse proxy on one quiet box.57 models fit →
With fresh eBay snapshots
Dated asking prices and our picks from current listings.
Lenovo
Lenovo ThinkCentre M710q Tiny
- Intel 6th Gen (Skylake)
- Intel 7th Gen (Kaby Lake)
- 1L tiny
- up to 32 GB
Good for: Home Assistant, n8n / automation, Proxmox homelab, Frigate NVR, Network services
$85–$120 typical eBay ask
Lenovo
Lenovo ThinkCentre M715q Tiny (1st Gen, AMD A-series)
- AMD A-series PRO (Bristol Ridge)
- 1L tiny
- up to 32 GB
Good for: Home Assistant, n8n / automation, Proxmox homelab, Network services
$90–$160 typical eBay ask
Lenovo
Lenovo ThinkCentre M715q Tiny (2nd Gen)
- AMD Ryzen 2000/3000 APUs (Raven Ridge / Picasso)
- AMD A-series PRO (Bristol Ridge)
- 1L tiny
- up to 32 GB
Good for: Home Assistant, n8n / automation, Proxmox homelab, Network services
$95–$170 typical eBay ask
Lenovo
Lenovo ThinkCentre M720q Tiny
- Intel 8th Gen (Coffee Lake / Whiskey Lake / Kaby Lake-R)
- Intel 9th Gen (Coffee Lake Refresh)
- 1L tiny
- up to 32 GB
Good for: AI agent server, Local LLM, Home Assistant, n8n / automation, Proxmox homelab, Frigate NVR, Plex / Jellyfin, Network services
$110–$180 typical eBay ask
Lenovo
Lenovo ThinkCentre M75q-1 Tiny
- AMD Ryzen 2000/3000 APUs (Raven Ridge / Picasso)
- 1L tiny
- up to 32 GB
Good for: AI agent server, Local LLM, Home Assistant, n8n / automation, Proxmox homelab, Network services
$140–$220 typical eBay ask
Lenovo
Lenovo ThinkCentre M75q Gen 2 Tiny
- AMD Ryzen 4000 (Renoir)
- AMD Ryzen 5000 Mobile (Lucienne / Cezanne / Barcelo)
- +1
- 1L tiny
- up to 64 GB
Good for: AI agent server, Local LLM, Home Assistant, n8n / automation, Proxmox homelab, Network services
$210–$330 typical eBay ask
Popular picks
Lenovo
Lenovo ThinkCentre M720q Tiny
- Intel 8th Gen (Coffee Lake / Whiskey Lake / Kaby Lake-R)
- Intel 9th Gen (Coffee Lake Refresh)
- 1L tiny
- up to 32 GB
Good for: AI agent server, Local LLM, Home Assistant, n8n / automation, Proxmox homelab, Frigate NVR, Plex / Jellyfin, Network services
$110–$180 typical eBay ask
Dell · 2019
Dell OptiPlex 7070 Micro
- Intel 8th Gen (Coffee Lake / Whiskey Lake / Kaby Lake-R)
- Intel 9th Gen (Coffee Lake Refresh)
- 1L tiny
- up to 32 GB
Good for: AI agent server, Local LLM, Home Assistant, n8n / automation, Proxmox homelab, Frigate NVR, Plex / Jellyfin, Network services
$150–$380 typical eBay ask
HP · 2018
HP EliteDesk 800 G4 Desktop Mini
- Intel 8th Gen (Coffee Lake / Whiskey Lake / Kaby Lake-R)
- 1L tiny
- up to 32 GB
Good for: AI agent server, Local LLM, Home Assistant, n8n / automation, Proxmox homelab, Frigate NVR, Plex / Jellyfin, Network services
$120–$300 typical eBay ask
Lenovo
Lenovo ThinkCentre M920q Tiny
- Intel 8th Gen (Coffee Lake / Whiskey Lake / Kaby Lake-R)
- Intel 9th Gen (Coffee Lake Refresh)
- 1L tiny
- up to 32 GB
Good for: AI agent server, Local LLM, Home Assistant, n8n / automation, Proxmox homelab, Frigate NVR, Plex / Jellyfin, Network services
$170–$240 typical eBay ask
Beelink · 2023
Beelink EQ12 / EQ12 Pro (N100 / Core i3-N305)
- Intel N-series (Alder Lake-N / Twin Lake)
- Mini PC
- up to 16 GB
Good for: AI agent server, Home Assistant, n8n / automation, Frigate NVR, Plex / Jellyfin, Network services
$390–$400 typical eBay ask
Minisforum · 2023
Minisforum UM790 Pro (Ryzen 9 7940HS)
- AMD Ryzen 7040 / 8040 (Phoenix / Hawk Point)
- Mini PC
- up to 64 GB
Good for: AI agent server, Local LLM, Home Assistant, n8n / automation, Proxmox homelab, Network services
$675–$925 typical eBay ask
Side by side
| Model | CPU generation | Max RAM | Storage | Ethernet | vPro |
|---|---|---|---|---|---|
| Lenovo ThinkCentre M720q Tiny | Intel 8th Gen (Coffee Lake / Whiskey Lake / Kaby Lake-R), Intel 9th Gen (Coffee Lake Refresh) | 32 GB | 1x M.2 2242/2280 PCIe 3.0 NVMe SSD slot, 1x 2.5-inch SATA bay. The 2.5-inch drive and the PCIe card slot are mutually exclusive. | 1 × 1 GbE | No |
| Dell OptiPlex 7070 Micro | Intel 8th Gen (Coffee Lake / Whiskey Lake / Kaby Lake-R), Intel 9th Gen (Coffee Lake Refresh) | 32 GB | 1x M.2 2280 slot for SATA or PCIe Gen3 x4 NVMe SSDs, 1x 2.5-inch SATA bay with a tool-less tray (SATA connector is hard-mounted). | 1 × 1 GbE | Some CPU options |
| HP EliteDesk 800 G4 Desktop Mini | Intel 8th Gen (Coffee Lake / Whiskey Lake / Kaby Lake-R) | 32 GB | 2× M.2 2280/2230 PCIe x4 NVMe + 1× 2.5-inch SATA bay. HP does not offer the 2.5-inch drive together with a second M.2 SSD, a discrete GPU or a 95 W CPU, and an STH reader reports the second M.2 drive can foul the 2.5-inch tray. M.2-only units ship without the SATA drive bracket. | 1 × 1 GbE | Some CPU options |
| Lenovo ThinkCentre M920q Tiny | Intel 8th Gen (Coffee Lake / Whiskey Lake / Kaby Lake-R), Intel 9th Gen (Coffee Lake Refresh) | 32 GB | 1x M.2 2242/2280 PCIe 3.0 NVMe SSD slot, 1x 2.5-inch SATA bay. The 2.5-inch drive and the PCIe card slot are mutually exclusive. | 1 × 1 GbE | Some CPU options |
| Beelink EQ12 / EQ12 Pro (N100 / Core i3-N305) | Intel N-series (Alder Lake-N / Twin Lake) | 16 GB | 1x M.2 2280 NVMe, wired PCIe 3.0 x1 (about 1 GB/s), plus a 2.5-inch SATA bay with its own small fan in the lid | 2 × 2.5 GbE | No |
| Minisforum UM790 Pro (Ryzen 9 7940HS) | AMD Ryzen 7040 / 8040 (Phoenix / Hawk Point) | 64 GB | 2x M.2 2280 PCIe 4.0 NVMe; no 2.5-inch bay | 1 × 2.5 GbE | No |
Shop by brand
Shop by CPU generation
- Intel N-series (Alder Lake-N / Twin Lake)6
- Intel 4th Gen (Haswell)1
- Intel 6th Gen (Skylake)6
- Intel 7th Gen (Kaby Lake)6
- Intel 8th Gen (Coffee Lake / Whiskey Lake / Kaby Lake-R)13
- Intel 9th Gen (Coffee Lake Refresh)7
- Intel 10th Gen (Comet Lake / Ice Lake)6
- Intel 11th Gen (Tiger Lake / Rocket Lake)1
- Intel 12th Gen (Alder Lake)1
- Intel 13th Gen (Raptor Lake)2
- Intel Core Ultra Series 1 (Meteor Lake)2
- AMD A-series PRO (Bristol Ridge)2
- AMD Ryzen Embedded R1000 / V10002
- AMD Ryzen 2000/3000 APUs (Raven Ridge / Picasso)4
- AMD Ryzen 4000 (Renoir)2
- AMD Ryzen 5000 Mobile (Lucienne / Cezanne / Barcelo)4
- AMD Ryzen 6000 / 7x35 (Rembrandt)5
- AMD Ryzen 7040 / 8040 (Phoenix / Hawk Point)5
Before you buy
- Used Mini PC Buying Checklist: What to Check on Off-Lease Tiny PCsPower brick wattage, BIOS locks, Absolute/Computrace, vPro, RAM limits, M.2 types and missing parts: the checks that matter on a used 1-liter PC.
- Windows 11 on Used Mini PCs: Which CPU Generations Are SupportedIntel 8th gen and newer is in; 6th and 7th gen are out. On AMD, Ryzen 2000 GE APUs and A-series are out, but 3000 GE and newer are in.
- ThinkCentre Tiny vs OptiPlex Micro vs EliteDesk Mini: Used GuideGeneration map, vPro tiers, expansion slots, dual-NVMe models, NICs and noise for the big three 1-liter business PCs on the used market.
- Quick Sync Transcoding by Intel Generation for Plex and JellyfinIntel 6th gen through Core Ultra and N-series: what each Quick Sync generation decodes and encodes, HDR tone mapping, Plex vs Jellyfin, and AMD.
- Intel N100 vs N150 vs N305: Which N-Series Mini PC to BuySpec-sheet comparison of Intel's N-series chips, what the 16 GB RAM limit really means, and which one fits a router, NAS or media box.
- Beelink vs GMKtec vs Minisforum: Buying a Used Mini PCThe three big Shenzhen mini PC brands compared on product lines, RAM, support downloads, Linux and Proxmox results, and used-buying checks.
Mini PC buying questions
Will a used 6th or 7th-gen mini PC run Windows 11?
Not officially. Microsoft's supported lists start at 8th-gen Intel Core (plus Pentium Gold G5000 and Celeron G4000), so units like the ThinkCentre M710q, OptiPlex 7050 Micro and EliteDesk 800 G3 Mini are out. Windows 11 can be forced on, but Microsoft says those PCs aren't entitled to updates. They run Linux, Proxmox and Home Assistant fine.
Which AMD mini PC CPUs support Windows 11?
Ryzen 3000-series GE APUs (3200GE, 3350GE, 3400GE) and newer are on Microsoft's lists. Raven Ridge 2200GE/2400GE, Athlon PRO 200GE, A-series PRO and Ryzen Embedded R1000/V1000 chips are not.
What is vPro, and do I need it?
vPro includes Intel AMT, which allows remote power control and remote KVM below the operating system. It needs a vPro-eligible CPU, a Q-series chipset and the Intel I219-LM NIC, and it's only on the top tiers (ThinkCentre M9x0q, OptiPlex 7000, EliteDesk 800). Most home users don't need it. If a unit has it, set a strong MEBx password or disable AMT, and update the firmware.
The listing says the BIOS is password-locked. Can I clear it?
Don't count on it. Lenovo tells owners to contact an authorized service provider for forgotten passwords, and Dell's manuals say its RTC reset leaves the admin password in place. Ask for a BIOS photo showing no admin password, or skip the unit.
Do I need an NVMe or a SATA M.2 drive?
Check the slot. NVMe (PCIe) drives are M-keyed and SATA M.2 drives are typically B-keyed. Some slots take both, such as the OptiPlex 5050 Micro; Lenovo lists only PCIe NVMe drives for the M720q and M920q. Length matters too: most take 2280, and some also take 2230 or 2242.
Is a used Tiny PC good for Home Assistant or Proxmox?
Yes. Home Assistant OS needs a 64-bit PC that boots in UEFI mode with Secure Boot disabled. Proxmox needs a CPU with VT-x or AMD-V and 2 GB for itself plus memory for guests, and its ZFS docs say to start at 8 GB. An 8th-gen or newer unit with 16 to 32 GB and an NVMe SSD covers both.
How much power does a 1-liter business PC use at idle?
ServeTheHome measured roughly 10 to 15 W at idle (120 V) across 35 W units such as the OptiPlex 3070 Micro, ThinkCentre M920q and EliteDesk 800 G4 Mini. A 65 W-CPU OptiPlex 7060 Micro idled just over 18 W, and a ThinkCentre M920x with a discrete GPU idled at 29 to 34 W.
What does Absolute or Computrace in the BIOS mean?
It's theft-recovery firmware that stays dormant until an organization activates it. Once active, the agent reinstalls itself even after a disk wipe. A default, deactivated or permanently disabled state is fine. If it shows as activated, ask the seller to confirm the unit was released from the previous owner's account.
Have a mini PC to sell?
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