That has been an ongoing problem for anyone wanting to learn about DCC that isn't in a major city. I can count on the fingers of one hand the number of hobby shops that know squat about DCC and none of them are in Cincinnati. I'd venture a guess there might be *one* Digitrax system for sale in a retail store in the entire 2-million metro area at this moment, in one of two possible places. DCC is not a fast learning curve, and it's not necessarily fair to expect dealers to instantly know all about it -- but it's not new anymore, it has been 5+ years since DCC really began to catch on, and it's still a mail order special other than decoders.
One of the best semi-local dealers to get DCC stuff from is Gordy's Hobbies who covers a lot of train shows in the midwest. There are also others, like Tony's and the one from GA that is pretty big. But the brick & mortar stores with few exceptions seem to have been left behind. It would seem like if they wanted to sell DCC, and get a solid customer base buying decoders, accessories, telling their friends, etc. that having a demo system in the store would be rather useful. Let customers get a feel for the system, try out some DCC-equipped locos like the Atlas stuff, or have a look at a few converted locos with the shells off, to get some idea of what's involved. This would be a modest investment for the dealer - basically for Digitrax a Zephyr system ($200 sticker) at dealer cost plus a few decoders... and a little effort to set the thing up. DCC is an area where the *service* aspect of the LHS could really come into play, and yet most of them aren't even trying. I think a lot more people would try DCC if they could have some hands-on experience before taking the plunge.