There are some new projectors using the new S2K chip set for smaller screens like aznphan74 wants to use that are supposed to be available for about $30,000 already. Here is an example of the NEC NC900C touted at that price back in November.
www.slashgear.com/nec-nc900c-digital-cin...s-is-30000-09256303/
This kind of pricing should put pressure on used gear to fall rather than stay the same. I would think that mostly smaller theaters are the ones who will be seeking out used gear. If someone truly needs something capable of lighting a bigger screen, then limited supply of used equipment may indeed push the prices up. The guy shopping to equip a smaller theater will have the advantage of being able to tell the used equipment dealer, "Sorry, but that's too much. I can buy a new one for that." Then start to walk away. If the dealer is hungry, he can make a deal. If not, then buy a new one.
The equipment dealer will have the guy shopping for his bigger screen right where he wants him. "Sorry. I can't do any better on the price. It's the only one around." All the while smiling like a Cheshire cat.
This situation might not push the used ones to half price or anything like it, but I wouldn't be surprised to see them drop a bit with the right kind of negotiating skills.