You have this included at the end of your linked auction:
Keywords: Jamma , Arcade , Sega , Video Game , Board , CPS2 , Plug and Play , Coin , Dip , Board , Mame , CPS , CPS1 . PCB , DDR , Capcom , CD , emulation , emulator , Marvel , Evolution , Namco , SNK , Atari , button ,start , X-men ,Xmen ,X men , Street , Fighter , Streetfighter , Vs , Capcom , Marvel , super , heroes , hero , heros , battery , suicide , Phoenix , CPS2 ,Rom , flash , eeprom , prom , eprom , cord , manual ,
Spammed Keywords: Sega , Mame , CPS1 , DDR , CD , emulation , emulator , Evolution , Namco , SNK , Atari , cord , manual
Those keywords have absolutely nothing to do with your auction. Keywords are perfectly acceptible when they actually apply to the items in the auction. Please see eBay's guidelines page for keyword spamming here:
http://pages.ebay.com/help/policies/keyword-spam.htmlI don't see any reason that these won't sell well. It is just a personal pet peeve that I have when I search for very specific items on eBay and I get completely irrelevant items. In other words, anyone searching for "DDR" items should never have your auction returned as a match, but it does right now.