thought i would drop this here just in case it is of any use to anyone, was cycling home about 25 mins ago, turned into filton avenue from Gloucester road (near the Bristol rovers ground) and was called from the other side of the road by a bloke in a baseball cap and a blue or white sports type jacket who asked me "Trek for sale, two-fifty". I couldn't stop or see much more than that because there was traffic behind me, the bike was obscured by parked cars, so i could only see the saddle and top part of the frame, it said Trek on it and the frame was silver.
Seemed suspect as hell to me, there are so many ways to sell an unwanted bike if its legit that have to be better than walking around the streets yelling at strangers. I have reported it to the police on 101, did this as soon as i got home, so maybe 10 minutes after the incident, they said they would send someone to have a look around and see if he is still about. Thought i would put it here as well tho just in case it helps anyone. Not sure of any other forums or groups for this sort of thing.