Holy crap!! Where did he find them, in a skip?! Looks like a few chunks missing tbh, but you never know they might clean up a bit. Just think more like what you'd like to pay and bear in mind no one's gonna be ripping his arm off. I'd start by offering ?40 myself.
Surely if he got them from a good place they would be in better nick so he prob got them for free somewhere - just my guess of course. Besides he put the offer button in there so he knows he's not going to get that.
Here's a link I found that might help:
http://www.306gti6.com/forum/showthr...0101&page=last
Gives you the gist anyways, good luck dude!