Looked right through the dell site today and a couple have dropped in price since the Thursday update.
This ones cheap enough if your only needing a small spec system.
Remember to reduce the warranty to minimum and by via Quidco for further cashback savings
305-D11C15 - £329 or less delivered
AMD® Sempron Processor 3400+
Genuine Windows® XP Media Center Edition 2005 (Incl Operating System Re-installation CD)
Dell 17" Value Flat Panel (E177FP)
256MB Single Channel DDR2 533MHz [1x256] Memory
80GB (7200rpm) Serial ATA Hard Drive with 8MB DataBurst cache
48x CDRW/DVD Combo Drive
Integrated nVidia® GeForce® 6150 LE graphics
Dell 2 Button USB Wheel Mouse - Black
Integrated 7.1 Channel High Definition Audio
Microsoft® Works 8 - English