This is not to be confused with the Austrian made 9mm Glock 17, or any other Glock handgun, which are constructed of both steel and polymer, and would quite easily set off an airport metal detector. Retail price on any other Glock firearm is most likely much less than what the Dulles International Airport Police Chief makes in a month. Most Glocks range in price from $400-$600 USD.
No, the "Glock 7" doesn't really exist. I would advise against going into your local sporting goods store and trying to order one. Unless, of course, you enjoy being thoroughly and relentlessly made fun of.