I bought my first car at fall Carlisle in 1979. It was a 1966 GTO for $2,600.00.
The car I really wanted was a gold 1967 Firebird 326 HO 4spd convertible with black top and interior and rallye II's. I just couldn't scrounge up the $3,500.00 they were asking. Besides, Dad was opposed.
Some other cars at the show that year: 1969 T/A 1965 Shelby GT350H Original Cobras were plentiful (not the Mustang kind) Hemi Mopars Cougar Eliminator
Somebody could have stocked up on this stuff. Prices over $10,000 were not common back then.