Dude, chill. Write to them and see what they have to say and what they can do for you.
Life is too short to get worked up over things like this. Although I do see your point. It really is a dumb practice by ebay, especially taking into account the stuff you've sold in the past. Like I said, shoot them a short email and see what they can do about it.
If they won't budge, then too bad for them, their loss, just say sayonara to them and walk away.
