1969 CB750 sandcast prototype
 

Had to share this one with all the old bike junkies on here.

Honda CB | eBay

I don't know if I would trust the listing without seeing the bike in person myself, but regardless even if it isn't what he says it is it is still a VERY beautiful bike. I've almost gotten one of the later model 750 4's a couple times to restore. There are a bunch of mid 70's models in GA floating around. First have to finish my friends CA95E Benly though

I guess a phone call to World Motorcycles would confirm if the auction is legit.