69 barracuda; what's it worth?

65 valiant...

you didn't say "what kind of car" you are looking at - a fastback, coup or convertible.

a "rough" non-driving fastback could range from $1500 to $5000

a "rough" coup would be in the same range as a fastback

a "rough" convertible is probably worth a little more - say $2000 to $6000.

without more information and PICTURES showing body style, motor/trans, rust issues, parts missing, original valuable parts still in place, etc., it's impossible to give you anything but a wild guess.