Well, I went to go trade in my z06 which I bought from this same dealer about 6 months ago. So, they inspect the windows which need new motors. I already knew that, so they deduct that off the initial trade in value they offered me. No big deal for me, I anticipated that. But...then they want to deduct about $1,600 dollars because they said it needs new tires. I told them that the tread is all within spec, that seemed to fluster them a bit. They then proceed to tell me that it is because the tires are too old (factory tires that came with it in 2003). I researched on the DOT website and Highway Safety website, both of which indicate that tires are good for 10 years if they have been in use. Has anybody had a dealer try pulling this one on you. I've seen some sleazy practices, but this one actually made me laugh.