[RichSchmidt]

They are very rare cars,more rare then Yenko/Copo cars.70 thru 73 Firebirds have a rabid following that rivals or exceeds that of their first gen counterparts.The SD cars were the last of the Muscle era Muscle cars,and were legitimatly fast in the road tests of the day,because of the fact that the engines were powerful,combined with the fact that the much wider radial tires gave them much better showroom stock traction then bogblock cars of just a few years earlier that ran on 6 inch tread with bias plys.Mid 13's in off the showroom floor trim with road and track type drivers is faster then the majority of off the floor 454 Chevelles and Hemi Cuda's of that era.In today's market any muscle car going over 100K has to be the cream of the crop,but in all fairness the 73 SD cars are among the best,and are much more sought after then the much more garden variety 454 4 barrel T/A's and Formulas of that year,so I could see them commanding top dollar.Remeber that we are talking about some of the best performing muscle cars with what could be only double digit numbers of remaining examples.