These should work pretty well as autocross tires, Two sets of American Racers:
Set 1: These only have four (4) heat cycles on them, then they were dismounted and wrapped and stored in a mild climate, $150.
Set 2: Unknown number of heat cycles, good amount of rubber left, $80.
I also have several cans of Thor Oil Brand Tire Prep Wintergreen #12 that can be used to soften them between events or sessions for added traction. This has been used successfully by the circle track guys for years. $13 per can plus shipping.
Email, PM or call
Lee
951-551-7362
65356sc@msn.com