I have come across the listing for this "roaster" in my travels around Ebay a few times.
$500 is a bit steep for an as yet completely unknown machine from an unknown source, however the El Salvadorian unit that has been "reviewed" here was originally marketed in a similar price range but did not appear as sturdy or come with a built heating element or any thought of temperature probes.
For all the things that make the Video the gem that it is, it does in fact show the roaster functioning, maybe not the way it should be to produce the best results.
While I nor it seem any one else here had any intention of purchasing a the Blue Bell Roaster at list price I am also not interested in being the tester of this unit, at least not at current price.
If the basic design was solid then I might consider it, then upgrade motor, better gages, and add curse control, might make for nice little hot rod.

I have 8 methods to make coffee and growing.
Dory
LMWDP #176