I don't know whether posting ebuyer deals is still not allowed or what, so apologies if this is still the case...
ANYWAY... the best price I have seen for a fully fledged 4850 so far.
This Powercolor 4850 has onboard VGA, DVI and HDMI which is great if you don't like using adapters, and is perfect if you want to hook it up to a home cinema system, for the 7.1 LPCM audio output :)
£71.63 inc supersaver delivery is a great price for this card; if the rest of your PC can handle it. Don't get me wrong this is no longer a top of the range card, but it handles a lot of great/recent games at stupid resolutions, and well 2 of these for crossfire...
Manufacturers Website: http://www.powercolor.com/eng/products_features.asp?ProductID=5859#
It has a new Arctic Cooling cooler (dual slot) so it should keep temperatures and noise down. For the price I think it is stunning value, especially considering it performs better than a 4770 at stock, and 4770's are like hens teeth atm.
Just make sure you have a PCI 16x lane free along with the 6 pin power connector
~ 30 in stock at the time of posting.