OTOH, you're only familiar with your area of the country. If yours is worth $8700, I submit their are units with lower mileage (50k or less) that are worth 12.5. Maybe you can't sell one for that, but maybe someone can. I would never buy from a car dealer because I don't trust them one bit. I'd pay more from a person knowing the history of his/her car than some fast-talking salesmen.
This post isn't intended as an insult (as it seems)...more a counterpoint.
BTW...I wonder if you're familiar with the pricing for some very nice lift kits and monster mudders (for the crew that really likes to 4x4). I bring this up as another price-adder to the selling values.