By provenance I mean that the seller doesn't offer any history on the bicycle regarding what happened to it after the tour and how it came into his possession and exactly why he is selling such an item. It appears a little unrealistic that a private seller has a) managed to obtain such an item (although it is within the realms of possibility) and b) is selling it on e-bay whereas he might expect far more favourable returns from offering it to a more commercial audience.