I have only purchased one used bike way back in 1974..A Honda 450 twin...Low miles and turned out to be okay....As far as used F6B's go I would not hesitate to buy a low mileage used one as most owners of this bike will most likely take decent care of it...Very little goes wrong with this machine and used ones, as well as older model new ones are going for " give away prices" and seem to be readily available for sale....Good luck and ride safe...