For storage I bought a few of the cases we had at the record store I managed and went from this.
to this
Made me happy until I filled them up. But the WAF on the cases in the living room is low.
If I were getting rid of them I'd do what we did at the CD store and sign up for an Amazon seller account and get a postage meter. I know there are a few that are relatively hard to get that I'd be getting a few bucks for. You just have to keep up on it to maintain your seller rating and make sure that what goes out is in good shape.
Of course, it also helped that we had a POS system that matched up our inventory with Amazon's, but you could get a barcode scanner for $30 and do that at the house if you really wanted to be slick about it.