As of right now, prices of vintage sneakers are based on either Flight Club prices or completed eBay auctions. Neither is particularly accurate when it comes to a sneaker's true value-whatever that is-as both tend to fluctuate wildly with demand (all it takes is two people who REALLY want a particular sneaker to drive an eBay auction sky high). If you're in the market for a used car, you consult the blue book. When is someone gonna write one for sneakers?

[Image via]