I think the O2 may well be a 97. Depending on what you want to do, it looks like a classic case of the value being twice as much if split and sold part by part as it would be if you sold it whole. I would say £200-250 as a bike, over 400 in parts. The Pro Class fork and the wheels would both fetch more than the frame, while the XT stuff would also sell quite well.
i don't know about the Montana. Would need a photo of the repair in order to say anything.
i don't know about the Montana. Would need a photo of the repair in order to say anything.