Star Wars LEGO seems to be the worst. I went to the Bellevue, WA store a few years ago before Christmas. I have no interest in SW or SW LEGO (I'm much more into the Architecture series).

I was walking around though, and an associate came up to me and pointed out that the Death Star (IIRC) was about to stop being sold so if I wanted one I should grab it... "... and that we have several of it, so if you want allll of them."

I despise scalping, though, but perhaps I should.