1) IMO it's more likely that an ignorant person would go to a gun show than it is that they would come to the ODT (seriously, how many people do you think surfed the ODT before ever setting foot in a gun store?)
2) Ammo is not readily available unless you can take a day off of work and drive to georgia arms, or sit in walmart all day long waiting on a shipment. People have a CHOICE to pay retail or above msrp for glocks and such. Ammo not so much.
Fact: Ammo is probably readily available if you go to some place other than big box stores.