Realise your probably looking for something in London but i have a beater that i was about to put on the bay. might be too much of a beater but im only looking for aound £50 and i reckon it could be quite a good polo bike with a little work.
i had it on ebay a while ago and it got to round £75 i think it was but the winning bidder turned out to be a total chump and couldn't pay for it.
Where you based like pal?