Mate, look at the pricing in the 370z For Sale section of the forum. Look at the going rate for perspective miles and years. You may even find a great deal there from someone desperately looking to get rid of it. For 09's I would look closer to 25k. You can even find 2010's for incredible deals also. Check eBay, cars.com, Craigslist. You never know what you'll find plus you'll get a rough idea of what certain years and amount of mileage are worth in respect to the Z.