just the box, or monitor keyboard mouse as well?
Just the box:-
GeIL 2GB (2x1GB) PC6400C5 800MHz Value DDR2 Dual Channel Kit (GX22GB6400DC)
(£52.86)
EVGA GeForce 8800 GTS 320MB GDDR3 HDTV/Dual DVI (PCI-Express) - Retail (320-P2-E811-AR)
(£187.99)
Abit IP35-E (Socket 775) PCI-Express DDR2 Motherboard
(£76.36)
Enermax Noisetaker 535W EG565AX-VE(W) SFMA ATX2.0 SLI Compliant PSU
(£58.74)
Intel Core 2 Duo E2160 "LGA775 Conroe" 1.80GHz (800FSB) - Retail
(£61.09)
Hitachi Deskstar T7K500 NCQ 250GB SATA-II 8MB Cache - OEM
(£38.76)
Total : £487.50
Its a little over budget, but well worth it IMHO.