You think they like it because it's cheap (kinda looks like a Glock but half price I guess)?
I think that they like Sigmas due to not only their price, but also the S&W name. A lot of these kind of guys are broke, but are still the kind of people with fancy clothes and shoes. In my opinion, they don't want to tell their buddies that they carry a Hi-Point, so they buy the cheapest name brand gun available. Sadly enough I sold the first gun for our store this year...and it was a Sigma.