530i:
I'd be careful about buying in just yet, Ken. Alvin Snaper (one P) is a force to be reckoned with, for certain and the technology has always been more-or-less accepted as some pretty fine stuff. Our problem, as you have aptly described, is the shirtsleeves guy. In this instance, the dude's name is Lee Balak (Elbee for short). Run a "Google" on Lee Balak and you'll find an unremarkable background with some scrapes with the SEC. In addition, Mr. Snaper has a warrant out for his arrest for paying his rent on Snaper's building with rubber. Our shirtsleeves guy has been working (?) for six years now trying to get someone, anyone, interested.
Please, prior to purchasing, run that Google.