Of course, the more people that buy them, the cheaper they will become. Most of the problem is they're manufactured in Denmark. Unfortunately because of our importation policies, they end up being very expensive compared to a similarly sized turbo. Actually, the larger frame sizes aren't all that much more than the larger frame sizes of the Garrett line. The Rotrexes are actually quite simple little devices, with a few critical clearances, but not too bad from a manufacturing sense.
-Kirk