Sorry but I have no idea (price will vary by region of the country you are in).
I ran out and refinanced my house because I believe the fiscal sky is about to fall (got out of a variable rate to pick up a 15 year fixed rate). Right now loans are hard to find if you need one (thankfully I didn't) so rates are low and if you have good credit you can walk in and sign for a new car (bought a new pick-up last week also). However if you don't have money already; you can not buy anything with someone else's money, whether a house or a car. (I was shocked to see the prices of used cars as they are running 85% of the price of a new one, and it isn't the car's value that drives up the price, it is the cost of financing).
Rich people (those with more dollars in their pockets than sense) buy their muscle cars and super cars at Barrett's, not out of the classifieds. So right now it is a buyers market unless you are willing to finance the sale and reposes later if it doesn't work out (and hope the new owner didn't treat it like a rental).
Your price will depend upon what every one thinks on first impression. You have a very heavily optioned car with a big block; but will the interior put them off? Question that comes to my mind (keeping in mind that I am an old racer, not a body man or car restorer) is if the interior is cheap and easy to fix why hasn't it been done already?
Most buyers have no clue as to rust damage unless you can see the road through a gaping hole; and they can not change points without help. They have a desire for an old car and want a turn key vehicle that they can drive and enjoy. If you fix the interior I will wager it will be worth a lot more. (in used car lots they used to throw on seat covers to hide stains and rips to enhance the first impression).