i got a letter in the mail yesterday from the dealership i bought my 2002 nissan from -- saying if i traded my car in to them, and bought a new car from them -- they would refund me 100% of the original MSRP (about 17,200), plus give me an additional 6k towards the car. (excluding 350z)
seemed like a pretty good deal, expect i love my car, and would only trade it for a 350 - which they wouldnt do.
oh, and i think they said the only deduction (as long as the car was in decent condition) would be for mileage, i think it said 10 cents per mile.
no idea if its a good deal or not-- i'm sure the dealer still makes a ton of profit through the financing.. but it still caught my eye.