I am going to sell an old projector of mine, and I was wondering how much money you think it would cost. i dont need a precise answer, just something close to what the price would be.

I am projecting onto an 80″ screen. I am going to get either a Optomo, benq w100 or infocus n72 16:9 home theater projector.
I am leaning toward the infocus as it has great reviews, better dark levels and… well looks cool. I am hooking up a HTPC, DVD (480p) and a Wii (480p). [...]