If it makes you feel any better this is a dumpr from the Black Cap Book valuation of that car.
IMO what you see there needs to be at 50% valuation as a pre bent car
NISSAN 350Z COUPE 3.5 V6 3dr (2003), 2005 55 , 64,000 Miles
Mileage Retail Clean Average Poor
5,000 11250 9450 9050 8475
20,000 10595 8775 8350 7750
40,000 9725 7900 7475 6875
64,000 8775 6950 6500 5950
80,000 8175 6350 5900 5375
100,000 7550 5725 5300 4800
120,000 6925 5075 4675 4200