What's so hard about selling a car? Clean it up, write an ad, take a few pictures, save thousands. As Eric detailed, you are not coming out ahead trading it in except in convenience. Remember that the dealership is in it to make money, ultimately they are giving you less than your car is worth and selling you a new car for less than they have invested. They may fool you into thinking you are getting a good deal however......
dude..what do you know about selling and buying cars? wait..nevermind. i thought i was talking to someone else..where did that guy go?
