I've got pics of all 4 wheels/tires so you can see the condition. They're all in really good shape. The tires are Dunlop SP Sport 5000 225/55/ZR16. I can't find Z rated tires to get a price, but equivalent W rated on Discount Tires Ebay Outlet are $112 a piece, and mine are Z rated so would have cost more new. So obviously the tires are worth more than the wheels, so I figure $300 obo ain't a bad price.

I didn't have a tire tread depth guage to measure how much is left, but one of the pic shows the relation of the tread marker to the actual amount of tread left, so that covers that question.