You might consider joining the Glock Shooting Sports Foundation (GSSF)--$35 for new members and $25 annually to renew. After being a member for 1-year, you are entitled to a Glock Pistol Purchase Coupon (one every year) enabling you to purchase a Blue Label Glock @ law enforcement prices. You just want to make sure you have a dealer in your general location that participates in the program--if you call GSSF (they will not provide the list via email) they will ask where you live and give you a list of participating dealers. I purchased my new Blue Label Glock 17 (4th gen) for $375 and the Blue Label Glocks include 3 magazines. Unfortunately, they now make you wait 1 year before you get your first coupon, so it doesn't benefit you immediately. Personally, I really like the 4th gen Glocks--they have interchangeable backstraps, updated texturing on the grip, and an updated recoil spring assembly that noticeably reduces the recoil.
I currently have my second coupon--and plan on purchasing a Glock 21 (.45 ACP).
http://gssfonline.com/hot-topics.cfmHere is a current price list for law enforcement personnel (and GSSF members). I purchased my Glock 17 from Ed's Public Safety (looks like their prices have increased just a little) in Georgia. Unfortunately, GSSF now limits the list to dealers in your "general vicinity"....so make sure you call GSSF before joining.
http://www.edspublicsafety.com/glockindividual.html