I think the same thing applies to the Roy Smecks reissues as well. 12-fretters are a special kind of guitar that may not be to everyone's liking. They are great sounding guitars. I build a 12-fret Smeck-inspired Jumbo that is an amazing sounding guitar. I also make a Rosewood version with a natural top and fancy fingerboard inlays that is a replica of the Roy Smeck Radio Grande model from the 1930s.
http://www.fox-guitars.com/Fox_Guitars_-_Jumbo-12.html
I think there are a select few buyers who are GASSing for the JB. It's a real beauty, but I don't think it appeals to a wide group of guitarists, so there may be a shortage in the used market now and in the future. Just my guess.