You're better off Googling for an idea on prices. Then, and more importantly, you can decide how much you want for them rather than when people will pay, (there can be quite a difference in the numbers).
It is hard to put a price on these. Quite a few out there for sale, but there is a huge difference in the price range for them all.
Found a set witch were 6x13 4x100. And they were asking for $750 for them in Australia.