Refurbished Mini PC UK 2026: Best Homelab Picks

A refurbished mini PC UK buyers can trust is usually an ex-office ThinkCentre Tiny, OptiPlex Micro or EliteDesk Mini, and it costs a fraction of a new one. This guide prices six machines on 14 November 2026 and explains why tiny versus small-form-factor is mostly a storage decision for a homelab.

Stock is thin, so a button may land on a similar model.

Last updated: November 2026

Best refurbished mini PCs UK 2026 at a glance

The best refurbished mini PC for most UK homelabs right now is the Lenovo ThinkCentre M920q from Back to the Office at £268.99 (checked 14 November 2026). It has a 9th-generation Core i5-9500T, 16GB of RAM and a 256GB SSD. For 3.5-inch hard drives, for example a ZFS mirror, a tiny box cannot do it, and the pick is an HP EliteDesk 800 G4 SFF at £177.00 from third-party seller Root Communication on Amazon Renewed (checked 14 November 2026).

Tiny, Micro, Mini or SFF? For a homelab it’s mostly a storage decision

Lenovo calls its one-litre boxes Tiny, Dell calls them Micro and HP calls them Mini: a 1L chassis with an external power brick, one 2.5-inch drive and one or two M.2 slots. A small-form-factor (SFF) desktop is much bigger, with an internal power supply and, on HP’s EliteDesk 800 range, two 3.5-inch bays. For a home server the choice comes down to how many hard drives you want.

Specs come from Lenovo PSREF, HP QuickSpecs and Dell manuals (checked 14 November 2026). The M920q is 179 x 183 x 34.5 mm and HP’s SFF is 100 x 338 x 308 mm.

Two details catch people out. On the M920q, Lenovo says the 2.5-inch drive and the PCIe card are mutually exclusive, so a 10GbE card costs you the 2.5-inch bay. And Dell’s storage table for the OptiPlex 7070 SFF lists no two-3.5-inch setup.

The refurbished mini PCs worth buying right now

Amazon Renewed supplies the SFF boxes because no retailer we work with had a refurbished SFF with two 3.5-inch bays in stock. Its sellers are third parties, not Amazon, so we name each one.

HP EliteDesk 800 G4 SFF: the cheapest way to fit 3.5-inch drives

Amazon Renewed lists an HP EliteDesk 800 G4 SFF with a Core i5-8500, 8GB of RAM, a 256GB SSD and a DVD writer for £177.00, sold by third-party seller Root Communication, not Amazon (checked 14 November 2026). HP’s datasheet gives this chassis one slim optical bay, one 2.5-inch bay and two 3.5-inch bays, plus two M.2 slots.

That drive layout is the case for it, and it costs less than the M920q. Budget for more RAM than the 8GB fitted, and note the 8th-generation chip is the oldest here.

Amazon’s Renewed Guarantee promises a replacement or refund within a year for third-party-sold items. For my generation, an EliteDesk 800 G5 SFF (i5-9500, 8GB, 256GB) was £290.00 from NH Trading NW Limited (checked 14 November 2026). We rate the G4 8.3/10, held back by the third-party seller and the 8GB.

Pros

• Two 3.5-inch bays plus a 2.5-inch bay (HP datasheet)
• Internal power supply

Cons

• Only 8GB fitted
• Third-party seller, not Amazon

Check EliteDesk 800 G4 SFF on Amazon UK

Check EliteDesk 800 G5 SFF on Amazon UK

One to skip: the Dell OptiPlex 3080 Micro (i3-10305T, 8GB, 256GB) was £266.99 at Back to the Office (checked 14 November 2026), almost the M920q’s price for half the RAM. The ThinkCentre M720q is often recommended too, but it was not in stock at our retailers and we did not check its spec sheet, so confirm it on Lenovo’s PSREF.

Why I run an HP EliteDesk 800 SFF instead of a Tiny

I run an HP EliteDesk 800 SFF with a 9th-generation Intel chip (the G5 generation) because I wanted room for two 3.5-inch hard drives. I bought it refurbished with 8GB of RAM and upgraded it to 32GB, using its four RAM slots. Storage drove the choice: two 3.5-inch bays, space for a 2.5-inch SSD and two NVMe slots, of which I use one.

The two 3.5-inch drives sit in a ZFS mirror, so every file is written to both disks and one can fail without data loss. That layout needs two big bays, and a Tiny or Micro has none. The box runs Proxmox with two virtual machines and three LXC containers running Docker, a media server and other services.

Before this I had a Dell OptiPlex 7010 SFF with a 13th-generation Core i3. It only had room for one 3.5-inch drive, which is why it lost out for this job.

It is not too loud and it does not get hot. I haven’t measured its power draw, so I won’t give a figure. Note that the BTTO “800 G5” at £268.99 is the Desktop Mini, so for my kind of build you want an SFF such as the Amazon listings above. HP’s datasheet agrees with my setup: two 3.5-inch bays, one 2.5-inch bay, two M.2 slots, four DIMM slots up to 128GB and an internal 250W power supply.

Which CPU generation? Quick Sync, Windows 11 and vPro explained

Every pick here uses an 8th, 9th or 10th-generation Intel Core chip, which Microsoft lists for Windows 11 and which handles 10-bit HEVC through Intel Quick Sync. Microsoft’s list starts at 8th generation (checked 14 November 2026). Windows 10’s consumer extended updates run to 12 October 2027.

For Plex or Jellyfin, an 8th to 10th-generation chip handles 10-bit HEVC and HDR tone-mapping but cannot decode AV1 in hardware. If AV1 matters, Box lists a refurbished ThinkCentre M80q Gen 4 with a 13th-generation Core i5-13400T, 16GB and 256GB at £549.99 (checked 14 November 2026), with a one-year warranty and 30-day returns. That is twice the M920q’s price.

Be careful with vPro. Intel’s remote-management feature, AMT, depends on the processor, chipset and BIOS setup, and we cannot promise it on any unit here. Also avoid 6th and 7th-generation chips: a Computer Active guide dated 11 March 2026 suggested a Back Market mini PC with an i5-6500T, which is not on Microsoft’s Windows 11 list.

How much power does a refurbished mini PC use?

Published tests put tiny boxes at roughly 11 to 15W when idle. ServeTheHome measured 12 to 15W on a quad-core ThinkCentre M920q at 120V, with a 90W Lenovo adapter. It measured 11 to 12W idle on a six-core HP EliteDesk 800 G4 Mini, and 54W under the heaviest stress it could apply. These were specific used units, so treat them as a guide.

We found no published idle figure for the 800 G5 SFF, OptiPlex 7070 SFF, M80q Gen 1 or the NUC, so we are not guessing one.

For the network side, see whether you need a new router for full fibre, standalone WiFi 7 routers and local storage security cameras if you will record footage on your own box.

Before you buy: BIOS locks, missing power bricks and warranty small print

Ex-office mini PCs can arrive with a locked BIOS, no power adapter or a vague warranty, so ask the seller about all three. Dell’s manuals include a chapter on clearing BIOS passwords, and no listing we checked said whether the BIOS is locked.

Back to the Office’s M920q and 800 G5 pages do not say whether an adapter is included. Lenovo lists 65W, 90W and 135W adapters for the M920q and HP offers 65W, 90W and 150W for the Desktop Mini, so match the wattage.

Back to the Office’s T1A desktop listings show only “UK manufacturer warranty” with no length, so ask what it covers. The pages offer 14-day change-of-mind returns with a minimum £9.99 collection fee, and ask you to report faulty or damaged goods within 48 hours of delivery.

The law adds a point here. Section 22(2) of the Consumer Rights Act 2015 says an agreement that cuts the 30-day short-term right to reject short is not binding on the consumer. Our refurbished laptops UK guide sets out your rights in more detail.

The same pages say Windows 11 Pro in the spec table but “genuine Microsoft Windows 10” in the boilerplate, so confirm which you get. For memory upgrades, our guide to how much RAM you need explains why 16GB is the sensible target.

Where to buy a refurbished mini PC in the UK

The safest places to buy a refurbished mini PC in the UK are retailers that publish a warranty and a returns window. Box gives one year and 30 days, Amazon Renewed applies a one-year guarantee to third-party sellers, and Back to the Office publishes 14 days but no warranty length on its T1A desktops (all checked 14 November 2026).

Which refurbished mini PC is right for you?

If you want the best all-round Tiny

Choose the ThinkCentre M920q at £268.99, with 16GB fitted and a PCIe slot.

If you want two 3.5-inch drives in a ZFS mirror

Go for the HP EliteDesk 800 G4 SFF at £177.00, or the G5 SFF at £290.00 for my generation.

If you want the newest chip in a Tiny

Pick the M80q Gen 1 at £336.99, or the Box M80q Gen 4 at £549.99 if AV1 decode matters.

If you want lots of fast storage in a small box

Take the EliteDesk 800 G5 Desktop Mini at £268.99 for its two NVMe slots.

If you are on the tightest budget

Pick the OptiPlex 7070 SFF at £172.99 and accept one 3.5-inch drive.

How to buy a refurbished mini PC: step by step

1. Decide how many hard drives you need. Two 3.5-inch drives means an SFF.
2. Confirm the processor is 8th generation or newer.
3. Ask whether a power adapter is included and its wattage.
4. Ask whether the BIOS is locked and which Windows version ships.
5. Get the warranty length, returns window and any collection fee in writing.
6. Pay by card for buyer protection and keep your order confirmation.
7. On arrival, test every port and drive bay and report faults immediately.

Refurbished mini PC UK FAQ

TheTechVector earns a commission if you buy through links on this page, at no extra cost to you. Our picks and ratings are our own editorial judgement, and prices and stock can change after the date we checked them.

Written by Vaibhav Kulkarni

Vaibhav is the founder and technical editor of TheTechVector, with 15 years’ experience in quality engineering and software testing. He applies that background to auditing spec sheets, comparing price-to-performance, and checking hardware compatibility across our UK broadband, laptop, VPN, and smart home guides. All prices are checked before publication — if something’s out of date, let us know.