I've gone and upgraded my 720p Sony projector to a new 1080p (thanks to all those that helped me select the Epson 6500UB).
Projector is about 4 years old and runs great. It's never had the bulb replaced, but it doesn't get a *ton* of use. I did replace the air filter last year.
You can check out specs and such here:
http://esupport.sony.com/US/perl/model-home.pl?mdl=VPL-HS51®ion_id=1
I'm hoping to get $300 + shipping for it (if you live in the Dallas/Ft Worth area, I might even be able to hand deliver it for you!).