AMT has released similar value-added kits (two or even three models in one box) since the early '60s. The 500 suffix on the part number tells us the suggested retail price was $5.

Mark Lewis: "This 1965 Pontiac Grand Prix kit by AMT [kit T322-200] is one of the rarest model car kits in existence. When I say that, I'm not talking about the plastic parts inside—they've been ...