ebuyer have some for £145 including delivery...
http://www.ebuyer.com/UK/product/89079/rb/21200379089
Features
* Processor: Intel Celeron D 315 (2.26, 533, 256MB)
* Memory: 256MB DDR expandable to 2GB.
* Disk: 40GB 7200Rpm
* 52 X CD-Rom, additional slots available to add more optical drives.
* LAN 10/100
* ASROCK/ ECS Intel 845GV chipset with built-in 64 MB Intel Extreme graphics
* Audio on board incl. Front Pannel Audio
* 6x USB 4 Rear - 2 front
* PARRAREL Port
* SERIAL Port
* Game MIDI Port
* External bays: 2 x 3.5, 2 x 5.25
* Expansion slots: 2X PCI, 1XAMR
* PS/2 Keyboard and Optical Mouse
* Linux
* Windows Drivers Provided (Fully Compatible with Windows XP Home/Pro)
* Open office
* Software Included
* AntiVirus Software; Audio Player
* Warranty: 1 year RTB 48 hour response time though eSys Global Services.