If you want my opinion from one bay seller to another...
Include better descriptions. Like, what's the condition of the discs? Do they have any scratches? Are they all in working order? Are any missing? Even for as cheap as they are to start, I dunno, I'd be surprised at people bidding on them, cuz you gotta figure even the resellers wanna know what condition the items are in.
Also the condition of the box - I see you listed it in a couple of them, you should do that for all of them. If nothing's wrong with them you could say in good or at most very good condition.
Also simply stating "no returns or refunds" is worrisome from a buyer standpoint. When I read only that in the description, to me it says there's something wrong with the items. As long as the listing specifies there are no returns accepted, you don't need to repeat yourself unless you are indeed hiding something.
But my other question is: Why are you selling them at all?
Man, I should do like, a selling blog or something.