Everybody who's bitching about the DPG listed prices should go back to page 2 and actually read lancelet's excellent (if lengthy) post.

There is not one market for video games. There are many markets. As Joe has pointed out, the values listed are based on an aggregation of data from the different markets, and so may not be an accurate reflection of what you see in any particular market (e.g., ebay).

So you see different values in different markets. I don't know why you'd expect anything different. Especially with ebay, where (for example) two n00bs located anywhere in the world with a simultaneous hard-on for Klonoa can push an auction above $100.