I have a couple of shops local to me. One has good prices, but they stock a limited amount of mods and cartos (no Kanger stuff at all), one of the employees said they stocked it mostly out of convenience for customers, but they're a juice company anyway, so that's where they make their money.
One marks stuff up by 10-20% or so, I can live with that. They stock all the popular gear, too.
The other two have laughable prices. $109 for a SiD is simply ridiculous. That's just the unit, no battery or charger. They may be in trouble, because their gear is so overpriced I don't think they sell much, and their juice selections are very limited and not very good quality. They may stay open selling to newbies, but I don't think they're going to get much business from people who know more. If you look at the market, the successful shops are the ones who sell to the public, and run an online business, and offer a wide variety of gear and liquids. These two shops don't even have online presences with any pricing or availability.