We’re all familiar with the concept of a high-end auction: One-of-a-kind clothing, art, and jewelry is put up for bidding at places like Christie’s and Sotheby’s, sold to the bidder with the biggest pockets and fastest hands. But what about the lesser-known, yet still invaluable items up for sale? In other words, how much would you pay for William Shatner’s kidney stone? Below are 21 bizarre and questionable items that were sold at auction for big, big dollars. You won’t believe how much people will pay for the more random slices of pop culture and history.