car has 140,000 miles on engine, runs great

www.kbb.com will give you the information. Not knowing the options on it makes it hard for anyone to say but that site will give you the numbers after you fill in all the information.

Suggested Retail $2,325
Private Party $1450-1750
Trade In Value $950-1175

The best thing to remember with used cars is value is in the eye of the buyer. If you are planning to sell the car, you may make more money selling it yourself. But this takes time and effort. If you plan to trade it in, shop around. Get the best quote on a trade in value, and other dealers can match it or come close. I work at a car dealership, and all car dealerships usually pull their numbers for used cars from the same source.