I just purchased a Used Sony VPH-1272Q from a company called Extreme Projections (www.extremeprojections.com
) for $2200. The unit had 1400 hours on the CRTs. Ask for Brandon. The prices listed on his web site are VERY negotiable. I know he has let some VPH-G70Q projectors go for about 5-6k. The G70Q is a fantastic projector, although it does not have 9" CRT's.
Also, you can pick up a used VPH-1292Q, which has 9" CRTs for about the same price as the G70Q. The 1292Q is quite noisy, and MUCH larger. The picture quality of the 1292Q is supposed to be about as good as their flagship VPH-G90Q.
I am perfectly happy with the 1272Q, but if you are willing to spend the extra money, it is well worth it.
I know lots of people shy away from buying used CRT projectors, but my experience has been great. The quality of the picture completely blows away any rear projection I have seen. Even in a worst case scenario, the tubes can be replaced for around 2k. They even gave me a week to evaluate the unit.
Also, don't forget you will need a screen, which runs about $1000 to $1200 new, unless you go with a microperf (for putting center channel behind the screen) which runs the price up to about 5k.
Hope this helps. I am just getting started on my HT, but have done a lot of research on Sony CRT projectors.