I saw a decent one with unknown miles and inop A/C sold on BAT for 37K
https://bringatrailer.com/listing/1985-porsche-911-carrera-72/
There are two currently running on BAT.
https://bringatrailer.com/porsche/impact-bumper-911/
Only reason I'm even paying attention is because I'm thinking I might sell mine. I'll probably offer here and on CL first. I'm not sure how much value people put into operating A/C in a Cab. I generally only drive my car with the top down and I'd guess many cab owners are the same. It's part of the reason for owning a cab!