buying a bike off gumtree...

aaaaaaaaaah very clever chris. let's move onto a new topic. the moral repercussions of buying a stolen bicycle.

i just want a bike very fast and i'm giving less and less of a fuck about it all.

I think we're all pretty much in agreement on here that buying stolen bikes is wrong, he was simply trying to help you out and in the process try and stop what seems like a rather dodgy character getting money for possibly stolen bikes, if you want to go and buy a stolen bike then thats your choice, but don't expect to get much more help on here.