No Reserve: 1974 Norton Commando 850 Roadster

The 1974 Norton Commando 850 is a legendarily cantankerous British parallel-twin that refuses to stay dead—this one's got that correct right-side shift and honest air-cooled grunt that modern riders either worship or flee from. At four grand no-reserve, you're gambling on either scoring a genuine cult classic or learning why Norton went bankrupt, and that's exactly the kind of calculated risk that separates collectors from tourists.