Found this on scan:
Case (inc PSU) - Asus TM982 Black MicroATX Case with 400w aPFC PSU £27.50 £32.31
CPU (includes heatsink) - Intel Core 2 Quad Q6600 G0 SLACR, Kentsfield Core, Socket 775, 2.40 GHz 1066MHz 8MB Cache, Retail £99.49 £116.90
RAM - 2GB Dane-Elec Celenade Major, DDR2 PC2-6400 (800), 240 Pins, Non-ECC Unbuffered, CAS 6, Retail £18.99 £22.31
Motherboard (with VGA, Sound etc on board) - Gigabyte GA-G31M-S2L iG31 Express, S775, PCI-E (x16), DDR2 667/800, SATA II, SATA RAID, uATX, VGA £31.00 £36.43
HD (sata) - 160 GB Maxtor STM3160211/15AS DiamondMax 20, SATA II, 7200 rpm, 2MB Cache, 9 ms £21.33 £25.06
DVDRW (sata) - Samsung TS-H653N 20x DVD±R, 8x DVD±DL, DVD+RW x8/-RW x6, x12 DVD-RAM SATA Lightscribe Black OEM £12.49 £14.68
You could get this cheaper if you went for a smaller HD or if you used a HD or DVD drive you already had. Although I'd be tempted to spend about £10 more on ram and get 2x1gb Corsair or similar for dual channel. You should also be able to O/C to 3ghz with just the stock cooler.
Would make a great folding at home machine
