Well, I just wrote a big reply and it didn't post
But anyway, I am familiar with Czar8 (Andrew, I think was his name). He works for a (family owned?) business in Baltimore that deals in surplus business eqiupment of all kinds. Here's my take:
1) If you want to ask questions, Call him -- Don't use email. I found him to be busy, but honest.
2) You are buying surplus (essentially untested) equipment. It may work well or it may need a lot of work.
3) If you are close enough to visit his office, make an appointment and bring tools -- he lets you test and inspect things (I was surprised just how patient he was as I was looking over the pjs). Oh, and the neighborhood isn't great, make sure you have nothing of value in your car when you visit.
4) It's a big warehouse with all kinds of surplus equipment. Projectors are a very small portion of his business. When you get into the warehouse have a look around, he had a bunch of pjs that weren't on ebay when I visited, all of the major brands: Sony, Barco, Nec, Ehome. If you know what you are doing and perform your own inspection you could get a great deal. If you don't know what you are doing, you could be sending your new pj in for repairs once you get it home.
5) Be very very careful about buying remotely. If you can't visit and inspect the projector, I would probably look elsewhere. He knows very little about pjs and though I don't think he would lie, he could easily miss major problems with the pjs he sells. Also I have heard that his shipping is expensive.
If you have specific questions, let me know.
shoot