What's more is thanks to the gun ban there, the black market cost for a glock handgun not counting ammunition is around $12,000 cash versus what, 10x less in the US?
Now my conservative acquaintances who adore supply-side economics should understand that increasing cost inhibits demand.
You can buy a glock new for $500. In Chicago you can probably get a second hand one free off a car tire if you really need it, just don't worry about it's history