I priced this up... seems like a good deal to me...
£306 from Scan, although the PSU probably needs replacing? They have 500w PSUs from £20.
CASE/PSU: Jou-Jye NU-3505 Silver/Black Micro-ATX Tower Case with 300W aPFC PSU £22.99 £27.01 (on Today Only)
1 LN19446 Jou-Jye NU-3505 Silver/Black Micro-ATX Tower Case with 300W aPFC PSU
Motherboard: MSI K9VGM-V, VIA K8M890, S AM2, PCI-E (x16), DDR2 533/667/800, SATA I, SATA/IDE RAID, uATX £24.99 £29.36 (on Today Only)
1 LN15120 MSI K9VGM-V, VIA K8M890, S AM2, PCI-E (x16), DDR2 533/667/800, SATA I, SATA/IDE RAID, uATX
Hard Drive: LN19559 400 GB Western Digital WD4000AAJS Caviar SE, SATA II, 7200 rpm, 8MB Cache, 8.9 ms £46.39 £54.51
CPU: LN19291 AMD AM2 Athlon 64 4800+ Brisbane Core, Dual Core 2.5GHz, 2x 512KB Cache, Energy Eff'' Retail £46.98 £55.20
GFX: LN17073 512MB Sapphire RX1950Pro, PCI-E(x16), Mem 1400MHz, GDDR3, GPU 580MHz, 36Pipes CrossFire Master/Slave £66.99 £78.71
RAM LN11596 2GB (2x1GB) Corsair TwinX XMS2, DDR2 PC2-6400 (800), 240 Pins, Non-ECC Unbuffered, CAS 5-5-5-12 £28.99 £34.06
Optical: LN19437 LiteON DH-20A1S-18C Black 20x DVD±R, 8x DVD±DL, DVD+RW x8 / -RW x 6, DVD-RAM x12, SATA Black £14.29 £16.79
Net Total £251.62
Carriage £9.03
V.A.T. £45.61
TOTAL £306.26