The 70 Duster......

in todays market...time to re-negotiate...if you still want it and how bad they want to sell. Bet no one else will be able to pull the pin either with the bank appraisels.
Good Luck!

on your paint and body work...
I'd head right to the peoples court...ie small claims. Get a judgement...attach any assets...and get you stuff back.

the squeeky wheel ...gets the grease