I'm just about to give up listing plates on eBay. I've listed some really fabulous plates lately and nothing's getting bids. The only plates that have sold at all in the $50 range are E305 Rings of Lights plates. I only have two of those to sell so they'll probably be next.

Plates I've listed:

Prey
War of the Worlds
US launch team "I Made This" in the package!
Ninety Nine Nights Korean exclusive
Chromehounds in the BOX with the Japanese GAME!
Football Manager in the box

On the one hand it should be great for collectors that stuff is going so cheap. On the other hand, people who know the stuff is worth more than the current going price aren't parting with their plates. If you need a Final Fantasy XIII plate though....