Trying to figure out what I should be asking. Looked in Autotrader for my area and the range is from 8k-17k with about a 10k miles in difference. When i spoke to SZ last year and I told them everything they said about 13.5 and 15 if i waited it out. Everything that was after market was installed at Stillen. And all maintenance prior to me owning it was performed a Nissan Dealerships. The radio was replaced three times ( with nissan receipt showing so ), that how meticulous he was with his cars.