I paid £200 for a set without tyres which were said to be a refurb project but all that was wrong was the centre caps had the paint peeling off, which is a common problem apparently because of the chrome style paint that is used. If you get them and the centre caps are bad PM me I can show you what I did with mine.
I think I got a bargain with those though considering the polished lips looked brand new still. I think I agree with ewan221 regards price, factoring in that whoever buys them is going to have to spend around £300 (falken 452s from camskill come in at £289 delivered at the moment) to get some front tyres soon.
If they had the polished lips I'd have been interested in swapping as I'd have preferred a black wheel really, but you probably wouldn't be interested in the same wheels but in silver anyway!
You might struggle to sell/ swap them with a white lip though because I'm not sure that look right with any other colour of car really.