Photofeller,
In my experience, the Glock clan is much more practical and about "using" the pistols, rather than collecting them. For example, this (collecting) forum is pretty slow compared to many others here, like Gen'l Glocking... Also, the Glock Collector's Association is awfully small - barely enough membership to keep itself going. So, you see, collecting Glocks is more about long-term. They're the Colt SAA's of the 21st century. In the year 2150, a NIB 1st Gen G-17 will command big bucks, as will probably your FDE. But, for our lifetimes, not likely a very good investment. My collection is in the safe, and I've already told the 10-yr-old they are hers and that she should not sell them, if at all possible. Pass them on to her grandkids, and it will be one heck of a collection, and they'll be impressed with wisdom of great-great-grandpa.