If you punch it into nadaguide, the only options to check off are the development package, Harman Kardon stereo, and the navigation system. And deduct if you don't have leather which is a strange option as I believe most MB cars have tex which is leather like but most dealers will call it leather so they basically all have leather. That's one things about MB, the options cost more when you buy them, but used, they don't really add much to the price. From the dealer, I ended up paying a little below clean trade in. On the east coast, prices tend to be softer than on the west coast. Most individual sellers tend to price their cars somewhere between clean trade in and retail and some do so pretty close to retail if not over, but then they start to wonder why it doesn't sell. Try taking the car to Carmax or any dealer and see what they offer you on just a straight sale. Then try and get a few thousand over that, however I think if you're in a state that credits you for sales tax when trading in a car on a new car, it's better to trade the car in as the loss of the sales tax credit means you have to get so much more on a regular sale.