This might do, the motherboard supposedly supports Raid5, you have the 3 disks needed for Raid 5, 1gb Ram, good PSU and a solid case. However I know next to nothing about servers so it might not be what you need at all.
Liteon DVD-8900 16x DVD±RW/RAM (Black) - OEM £14.99
(£17.61) £14.99
(£17.61)
Asus GeForce EN7300GS-HTD 256MB DDR2 TV-Out/DVI (PCI-Express) - Retail £39.99
(£46.99) £39.99
(£46.99)
GeIL 1GB (2x512MB) PC5300 667MHz Value DDR2 Dual Channel Kit (GX21GB5300DC) £41.99
(£49.34) £41.99
(£49.34)
Intel Pentium 4 820 Dual Core "LGA775 Smithfield" 2.8GHz (800FSB) - Retail £54.99
(£64.61) £54.99
(£64.61)
Corsair HX 520W ATX2.2 Modular SLI Compliant PSU (CMPSU-520HXUK) £59.99
(£70.49) £59.99
(£70.49)
Hitachi Deskstar 7K160 NCQ 160GB SATA-II 8MB Cache - OEM (0A32728) £32.99
(£38.76) £98.97
(£116.28)
Antec SLK3000B Midi Tower Case - No PSU £28.99
(£34.06) £28.99
(£34.06)
Asrock ConroeXFire-eSATA2 (Socket 775) PCI-Express DDR2 Motherboard £49.99
(£58.74) £49.99
(£58.74)
D-Link DFE-530TX PCI Network Card £4.95
(£5.82) £4.95
(£5.82)
Sub Total : £394.85
Shipping cost assumes delivery to UK Mainland with:
City Link Parcel Next Day (Delivered Mon-Fri)
(This can be changed during checkout) Shipping : £10.95
Vat : £71.02
Total : £476.82