I copied the description out of the auction for you guys to read:
Exclusive 2013 San Diego Comic Con
LEGO Star Wars
JEK-14 Mini Stealth Starfighter
Limited to 1000
*Brand New Unopened*
One of the hottest LEGO items at 2013 San Diego Comic Con. Get yours today!
This wasn't a mistake - the seller knew what they had and knew that Lego sets that are advertised as used/opened do not command premium mark-up. (I did not add the asterisks they were in the description.)
If the box had come with the tape seals intact, I would have given the seller positive feedback and moved on. If the seals had been cut and the bag inside was a standard issue unopened Lego parts bag and all of the parts were in the bag, I would have still given the seller a positive feedback and moved on. Because it would be plausible that the seller opened the box to make sure everything was inside.
I am sorry you have had bad experiences as a seller Jman - but I am not the kind of buyer that drove you to your frustration with eBay. So let's just move on for the sake of this thread.