There are some more discounted cards but normaly you have to play £189.95+ VAT to get this card. It is a fast card, not the fastest around but it will do the job and will cost you some reasonable amount of money.
In Germany you can buy this card for 309 including VAT which is a nice deal and Germans will even give you Sapphire Hybrid Radeon X1800 XT, 512MB GDDR3, 2x DVI, ViVo, PCIe, bulk/lite retail (21073-00-10/20), 512 MB card for the money. You can buy this baby here.
MSI X1800 XT 256 MB version will sell for 273.91 and it is available but I would advise to spend an extra 40 euros to get the 512 MB card. You can find it here.
Nvidia will seel Geforce 7900 GT for roughly the same amount of money but this card will be limited to 256 MB only, not that you will miss the other 256 but it doesn't sound that cool. µ