there is a joe breeze series 2 mtb from 1980 up on ebay right now, looks like it will go for more than 6k. are their any bmx bikes from the 70s that would be similarly collectible? I found something saying the yamaha moto bike was but then read somebody else getting less than 300 for their on ebay.
the breeze bike was 1 in a lot of 25. and prior to that he made the series 1 , but only 10 of those.
Edit: final,price of above auction was close to 8500