I happened to get one of these recently. The playfield and plastics are in good shape. The backglass has a little bit of delamination in a solid black area and some tiny imperfections here and there.
While I am a fan of older Stern machines (Nine Ball is one of my all time favorites ... I am abnormally obsessed with that game), I am more of a fan of Williams System 11 stuff, so I will probably look to trade/sell it once I get it bulletproofed and shopped (still want to play it for a while to make sure I don't regret letting it go).
Still, the game is pretty good. I *really* wish they would have made it a standard size game vs. a widebody, but that's just me.
I would grab that playfield for $100. I am sure you can find a backglass if you get the rest of it up and running. While it is certainly a rare game, you'd have plenty of margin to procure a backglass. I am going to be scanning the cabinet for stencils as soon as my F&%(ing job reverts back to normal ... the entire month of July flew by and all I've been doing is work related crap!!! The only thing good about that is that it seemed to have rained all of the days I was locked up working .