Agree with most all above and can only add, Low Mile "Garage Queen" Marauders should earn +$3,000 to + $8,000 dollars over very clean and well cared for DD's for all the things that haven't been done to them.
While each finds their own auto qualities important (Paint, Interior wear, cleanliness, dings) even at an easy to calculate .05 to .10 cents per mile, a 20,000 mile "Garage Queen" car should bring an easy $5,000 over an 80,000 mile car. (BTW - This doesn't mean that YOU would pay it, it means that the market would pay it).
Paint, Interior, and wheels on these cars is so expensive, that it is indeed far cheaper to pay more for a cleaner car than it is to fix one up.
And someone flamed long ago about this (and I agreed with them), a "low mile" car has little to do with a cars age, and the old 12,000 miles per year national average.
Any car that has 100,000+ miles (many will argue it is 60,000 miles) is just a used fricken car, and cannot be considered a "Low mile" example. It may be a cool used car, but a used car none the less.
And wait, for the flamers... yes, if you have a bone stock '57 Bel-Air Chevy two tone Hawaiian tan over cream hardtop that has been in your family since new, and it has 90,000 miles... YES you can call that low miles BUT the same example with only 30,000 miles will bring you $30,000 to $70,000 more from a collector.
Our cars are cool. Many are 90,000+ mile examples that have the patina of use. These are COOL used cars. If a 90,000 mile CV/GM is worth $5000 then yes a Marauder should be worth twice that. Most ads though are a little unrealistic: I saw a MM for sale with 130,000 miles that needs paint, has tears in seat and center consol, scuffed wheels and the seller touted the MMs rareness and was asking $13,000. Cray Cray.
I think the value of our cars are going to rise quickly in the next five years. Time to buy more REAL low mile, extremely clean Marauders!