Build a Cheap Home Server / NAS with Used PC Parts in the UK (Under £150)
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Between mounting cloud subscription costs (Google Drive, iCloud, Dropbox, Netflix) and growing privacy concerns, more UK tech enthusiasts than ever are seeking self-hosted storage. However, purchasing a dedicated commercial 2-bay or 4-bay NAS unit from Synology or QNAP will comfortably set you back £250 to £450 before you even purchase a single hard drive.
There is a vastly superior, cost-effective alternative: repurposed UK enterprise surplus hardware. Hundreds of thousands of off-lease business desktops—such as the Dell OptiPlex 3060/7060 and HP ProDesk 400/600 G4/G5—are decommissioned annually in the UK. Powered by 8th and 9th Generation Intel Core processors, these machines feature phenomenal Intel Quick Sync Video hardware transcoding, draw as little as 12W at idle, and can be built into a complete 8TB NAS for under £150.
The Sub-£150 Bill of Materials (UK Market)
| Component | Recommended Hardware | Source | UK Price |
|---|---|---|---|
| Base PC System | Dell OptiPlex 7060 / HP ProDesk 400 G5 (i5-8500, 8GB RAM) | Used Enterprise Surplus (eBay/Koukan) | £65 – £85 |
| RAM Upgrade | Additional 8GB or 16GB DDR4-2666 | Used Desktop RAM | £12 – £20 |
| OS Boot Drive | 128GB or 256GB NVMe M.2 SSD | Used SSD | £10 – £15 |
| Bulk Storage | 2x 4TB Enterprise SAS/SATA Refurbished (HGST/Seagate Exos) | Refurbished Server Drives | £45 – £60 |
| Total Rig Cost | Complete 4-Bay Capable Plex / TrueNAS Box | Fully Configured | £132 – £180 |
For office machine sourcing tips, read our related breakdown: Budget Office PC Build Using Used Parts UK.
Which Case Form Factor Should You Buy?
Small Form Factor (SFF)
Holds one 3.5" drive officially, plus a second 3.5" drive in place of the slimline DVD drive using a 3D-printed or cheap metal bracket. Great footprint, whisper-quiet 200W 80-Plus Gold internal PSU.
Mini Tower (MT)
Full-height chassis. Accommodates three to four 3.5" hard drives directly and standard PCIe expansion cards (10GbE network cards or SAS HBAs). Slightly harder to find under £80.
1L Tiny/Mini/Micro
Extremely compact, but only holds one 2.5" SSD and one M.2 drive. Only suitable for pure compute or Plex servers with external USB drive bays.
Software Stack: TrueNAS Scale vs Unraid vs Proxmox
All three leading self-hosted platforms run flawlessly on 8th-Gen Intel hardware:
- TrueNAS SCALE (Free & Open Source): Uses enterprise ZFS storage pools. Requires drives of identical capacity in mirror or RAID-Z configurations. Unrivalled data scrub integrity and automatic snapshot protection against ransomware.
- Unraid (Paid License): Brilliant for mixing and matching mismatched drives (e.g. one 4TB drive, one 2TB drive, and one 8TB drive). Only spins up the specific drive being read from, saving electricity.
- Proxmox VE (Free): Best if your primary goal is running multiple virtual machines (Home Assistant, Pi-hole, Docker containers, Windows testing) alongside software storage pools.
UK Power Consumption & Annual Electricity Bill
With UK electricity rates hovering around 24p to 28p per kWh, a server running 24 hours a day, 365 days a year must be power efficient.
Real-World Measured Power Consumption
A Dell OptiPlex 7060 SFF with an Intel Core i5-8500, 16GB DDR4, an NVMe boot drive, and two spun-down 3.5" hard drives idles at just 14 Watts.
Calculation: 14W × 24h × 365d = 122.6 kWh/year. At 26p/kWh, your total running cost is only £31.88 per year (about £2.65 per month)—vastly cheaper than a £9.99/mo Google Drive tier!
Frequently Asked Questions
Why not use an AMD Ryzen processor for a home server?
While AMD Ryzen desktop CPUs offer superior multi-core compute for the money, standard Ryzen chips (like the 3600 or 5600) lack integrated graphics. More importantly, they lack Intel Quick Sync, which allows a £65 Intel PC to transcode 4K HDR media without stuttering or needing a dedicated power-hungry graphics card.
Are refurbished enterprise SAS/SATA drives safe to buy?
Yes! Enterprise drives (such as Seagate Exos or HGST Ultrastar) are built for 2.5 million hours MTBF. When bought from reputable UK sellers with SMART zero-bad-sector verification, they offer incredible reliability at £10-£12 per terabyte.
Can I add 10 Gigabit networking to an OptiPlex SFF?
Yes. The motherboard features a low-profile PCIe x16 slot. You can drop in an inexpensive used Intel X520-DA2 or Mellanox ConnectX-3 SFP+ card for around £20-£25.
Source Used Hardware for Your Server on Koukan
Find cheap DDR4 RAM, enterprise storage, and low-power CPUs backed by complete escrow payment protection.
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