EXPIRED - Dell Vostro 420 desktop base Q9400 2.66Ghz, 2gig, 160GB, dvdrom, Win 7, £412 or less delivered

Cant quite make up my mind on this one as the cpu is good but you do need to upgrade the other components yourself once you get it.
Drop the dvdrw for a discount, upgrade the cpu.

English Genuine Windows® 7 Home Premium (32 BIT)
Intel® Core 2 Quad Q9400 Processor (2.66GHz, 1333MHz, 6MB cache)
Microsoft® Works 9.0 - English
Display Not Included
2048MB 800MHz Dual Channel DDR2 SDRAM [2x1024]
160GB (7200rpm) Serial ATA Hard Drive with 8MB DataBurst cache
Integrated Intel® Graphic Media Accelerator X4500
16X DVD ROM For Win7
UK/Irish (QWERTY) Dell Standard Quietkey USB Keyboard Black
Dell 2 Button USB Optical Mouse