When it comes to collectible muscle cars, most of the big-money rides come from the Golden Age of the 1960s and early 1970s.

LeMans is ready to leave for a new home; the car is almost in perfect shape, sporting a rare package and a big engine ...

Across the entire model year ... which is mainly why the '73 Trans Am SD-455 is such a rare car. Although orders had been piling up throughout the year, Pontiac only managed to build 252 examples ...