How about this?
Arctic Cooling Silentium Midi Tower CASE 350W Seasonic Active PSU Superquiet
£58
MSI K8N Neo4-F S939 NForce4 1000fsb Dual DDR400 PCI-E SATA Raid Gbit Lan 7.1Ch Audio USB2
£69
AMD Athlon 64 3000 32/64Bit CPU S939 "Venice" 90nm Retail inc Heat Sink Fan & 3 Years Warranty
£101
1Gb (2 x 512 Mb) Corsair Value Select Kit, DDR, PC3200, non ECC, Lifetime Warranty
£63
128M Asus PCI-E EN6600GT-TD Tv/DVI Retail
£119
80Gb Seagate Barracuda (7200rpm,8MB) - SATA - NCQ
£41
Total = £451