whats the avg price for a vet-sting ray in very good condition from the mid to late 60's?

It always depends on the owner's value. Location makes a difference as well as options too. Someone in CA might want 30+Ks for a clean cruiser and the same car might go for 10K in Vegas from some dude down on his luck.
It helps to scope around.
Good luck man,
---TEX---

Big bucks, these are the most desirable of the Corvettes.

-slacker

a sh*t load