Well price has never really been a factor.

A Lorcin .25 that sells for 70 bucks legally sells for 250-300 illegally. For a street level dealer an income of 3000 dollars a week is not uncommon. Yes restriction on firearms will decrease the supply amongst those inclined to obey the law. Criminals by definition do not.

As far as I know, crack cocaine is illegal. Can you still buy crack cocaine in your county? That is the main fallacy behind gun control- that criminals will suddenly stop in their tracks and not KILL someone because the gun they are using is illegal.

Here's a quick Google- following came from Canada's House of Commons (not sure what that translates into in the US)

“Between 1997 and 2003, 574 homicides were committed with handguns. Among the 31% (176) of homicides in which a handgun was recovered, about three quarters (72%) of the handguns were not registered. About four in five (85%) did not possess a valid FAC of Firearms License. Where ownership of the handgun could be determined by police, the accused owned the handgun in half (49%) of these homicides, compared to 3% in which it was owned by the victim.”

About 50-50 when the handgun was registered.

For CCW holders in NC, last year 2 committed crimes with their handguns. Can't comment on other states.