Perhaps you should forward that info to Ebay, at least the seller may be banned or forced to credit you and prohibit them from future rip offs.
http://pages.ebay.com/help/policies/beta.html?fb=falseBeta software, test software and evaluation software are not permitted on the eBay site. These are early copies of software distributed by software developers strictly for the purpose of evaluation and troubleshooting. Violations of this policy may result in a range of actions, including:
Listing cancellation
Limits on account privileges
Account suspension
Forfeit of eBay fees on cancelled listings
Loss of PowerSeller status
Some Examples
Connor’s mother works for Adobe, and she brought home a “beta” copy of Photoshop 10.0 in order to test the program for problems. When she finished testing it, she gave it to Connor, who wanted to sell it on eBay. Because this beta copy of Photoshop 10.0 is not authorized for resale or distribution, Connor is not permitted to list the software for sale on eBay.