The description is quite confusing, because it has a Buy it now price of £8000, but the seller is asking for details on the history of the bike. It looks pukka, right foot shift conversion, all the right parts and even an AMA scrutineering sticker on the headstock. And not an outragous price, if it is a bike built by the late Shell Thuet and the motor is good, but only if you've got the money. G
Thanks to Kev H for the link.