I keep getting thoughts of selling my 2010 STS 1SC, y41, pdq. 45k miles. xlnt. cond, and getting a new truck. The dealer offered me $18,000. a few months ago. Looking on cars.cm at comparable mileage, some are for sale up to $28,000. Those seem way to high to me. Anyone have an opinion on a realistic value? I haven't really seen anything comparable to my car for sale locally. The prices vary so much between cars.cm, and ebay its hard to figure out a accurate value. And the values I've seen on kbb aren't always accurate.