Yep been looking on ebay - quite a few on there - all around the 25 quid mark incl postage.

It was the quality I was worried about - I guess it depends how good your car setup/aerial is?

Was wondering as an alternative whether they could be "wired" in to your head unit as craig says. Whats a KCA420?

I have a sony head unit and cd changer at present (it doesnt play mp3's)