I would say between $1350 to $1500.
Being retired military and living close to a military base, its not too uncommon to see commemorative firearms from the War on Terrorism, Operation Iraqi Freedom, Operation Enduring Freedom or Operation New Dawn. To this point, I've seen various AR-15s/M4s, 1911s, S&W/M&Ps, Sig-226/228/229, Glocks and Berettas with laser engravings.
Also, lots of individual units... At least Army units, will do a limited run on "deployment" guns, which are often ordered/purchased once back in the States.
...I have a Beretta M9 which was laser engraved with "Operation Iraqi Freedom," my unit's info and dates of deployment.