Having unwillingly donated two bicycles to thieves it occurred to me they wouldnt be nicked if there was no market for them or their parts. I avoid second hand for that reason when it comes to bikes (pedal or motorised). Surely with all the IT around now a system of traceability from manufacturer to store to customer to second hand could be worked up. It should be voluntary but I bet it would be taken up a lot at the higher price brackets. Even though I run a cheapie roadie I would take it up. Reducing theft would then get more people on the road as at the moment thaft is a massive deterrent to commuting on a bike, do we have any techno geeks out there? could be money in the idea!