67' firebird
A few things to look for:
-1967 was the only model year to have the non-staggered shock rear-end, and all models had mono-leaf springs. If either has been changed, that more money off the price IMHO.
-Being a sub-frame car, check the frame, floorpan and bracing condition for twisting and/or rust.
Other than that, I'd say it's worth the $15-20,000 if it's in great shape and/or restored and what options it has. Convertibles always command more money than a coupe as well.
Good luck!
Derek

