JR, are you proposing to sell the car for what it's worth or for what it owes you? Herein, I believe, lies the problem.
Just out of interest, RedBook lists V6 Capris as worth between $15,500 and $21,000, which to me seems a good starting point for the majority of V6 models that have been advertised over the past 12 months or so. Granted, there is the odd one now and then that is in pristine condition and does warrant a figure over the $30k mark, but very few I'd have thought. RedBook lists the 4-cylinder models as being worth between $7,200 and $10,800.
Of course any car is only worth what the next owner is prepared to pay!