Second hand components.
I've got an old Peugeot frame that I'm considering stripping down and rebuilding in various configurations, although probably initially to convert to Fixie. Thing is, this is all going to be part of a huge learning curve for me, so I don't want to go out and get decent components only to strip threads, install them badly and mess them right up.
So I was thinking, as a start, maybe use second hand components, just so I can learn the mechanics side of it, before doing anything with anything new and decent.
However, I wouldn't have the faintest idea where to go for something like a second-hand racer wheel. I don't even know where I'd get a second-hand bike, to be honest.
Obviously there's e-bay, but if I'm buying sprockets I'd probably like to see them first, right? I'm a pretty mobile bloke, 'cos I'm all over the country racing on foot, so does anybody have any suggestions as to what best to do?