Man, I used to love Star Trek The Experience! I made sure to visit everytime I went to Vegas, at least once a year. I even did the backstage tour. It's disappointing that the place has closed down.
I suppose that, as the novelty of the place wore off, attendance and revenue must have dwindled. But the place closed down mere months before the new movie opened, which seems like a huge lost opportunity to make more money and grow the fanbase. That movie was HUGE, and really stirred interest in Star Trek among a lot of non-fans.
According to that video, they're selling some of the stuff at an auction during the Trek convention in Vegas this summer.