Used Vidikron 2C...Should I or shouldn't I?

I have the right kind of room for a front projection configuration. I started shopping for the projector and screen and prepared myself for a $5000.00 Yamaha projector and a $1500.00 screen. I'm a newbie to the home theater world but truly would appreciate the movie-like experience of front projection. From conversation at the water cooler, I realize someone I work with is selling their house and wants to dump their front projector and screen. The unit is a Vidikron 2C with a automatic retracting screen for $2500.00. The Vidikron 2C goes for $1700.00 average price on this site...Any thoughts or comments? I know the Yamaha and Vidikron are apples and oranges but I'm thinking the lower price of the used Vidikron would allow me to beef up the audio experience.

Lean me one way or another...PLEASE!