Here in Michigan guns and ammo sales are always fairly steady, cpl classes are constantly full and overbooked, seems to be a lot of people carrying in Michigan now and that's growing constantly. So that in itself drives a certain amount of constant handgun sales.  I think most people are buying ammo over the internet, I know I do most of my shopping there.  There was a surge in sales a couple years ago...forget why. 
Used gun sales are pretty big in this area, probably driven by the fact people lost/losing their jobs and need some fast cash, sometimes the local paper is full of those.  Might depend where you live too, not sure how other states are doing.  
Jim