Barebones Proliant tower server, 3.3GHz Pentium G4400, 4GB unbuffered ECC RAM. Model: 837826-421, There's a £60 cashback offer on UK stock - details here
. Which ends Jan 31st 2017, Giving a final price of £89.57
2 x DisplayPort, 4 x USB 3.0 (rear), 2 x USB 2.0 (front), 1 x Gigabit Ethernet, 300W PSU, No hard disk, no optical drive. Main feature of interest is there are 6 x SATA ports. Faster CPUs (E3 Xeons) can be fitted.
I've checked with HPE promotions and Ballicom are an approved UK supplier. Reviews indicate this is a very basic tower box, room for 5+ HDDs (but may require extra hardware), but no drive cage.
**** Update 2016-12-22 09:53 - price now increased from £149.57 to £167.00 ...
**** Update 2016-12-23 21:10 - Installed Windows 10 onto my ML10, see details in comment #51