Do you still have the tires? If you do, how much for them?
I do but two of them are almost completely gone, pretty much zero grip. The other two still have some runs left in them. Not to mention the fact that the Z is pretty much useless for carrying anything bigger than a toothpick. I could fit the two good ones in the car probably. Here's a pic of one of the two good tires:
If you want 'em, I could sell you the two good ones for like $40 each (they're $180 a piece brand new). You can have the other two for free, but I'd have to bring them to you later.