whats a mint condition 1971 caprice coupe worth?
 

what a 1971 caprice coupe worth in mint condition?

Whatever someone is willing to pay. 10-20k depending. You just need to hold out for the right buyer,
but a huge coupe wont sell like an old mint Camaro, Mustang or Challenger muscle-car will.

The motor is high compression, with no catalytlic converter, so that will only help you out, but if it were pre-1970
I'd be better in price.

check these out.
https://cars.oodle.com/1971-chevrolet-impala/for-sale/