Very few Glocks will ever be classic collector handguns.
They are spectacular working handguns but that's about it.
Plus the design was so right on the money when it came out-today's Glocks are pretty much only changed for ergonomic reasons.
If you are determined to get into gun collecting for investment reasons you will need to read a heck of alot and learn a heck of alot and actually get some counseling from other actual collectors as to the guns you can buy that will appreciate in the future.
Most classic guns have already been snapped up and you will be buying into that collectors idea of what his or her particular investment is worth to them to be able to buy it.
Your investments will be much higher then your return in most cases especially since gun makers are now making handguns for a mass market that prizes cost and value over craftsmenship,design and construction.
So you can definitely get into guns as an investment but you will need to know a heck of alot more then now and have a substantial amount of money you can do without as your purchases appreciate in value.
And be very aware,some less then honest gunmakers and gun sellers see people like you as people that can be taken advantage off and they make 'collector' issue guns with impressively pretty paperwork,rolled colored scrolling and images on the side of guns that are pretty much just standard guns and try to gouge you to make a killing off of you.
A good way to think about this collector stuff is -who will buy the guns you have stocked and what is the current market buying those guns for.
It's not enough to just have a gun to sell,the value of that gun increases many times if you have a trail of ownership on notarized papaerwork that details the value of that firearm.
Plus,ANY firearm that has been refinished loses a heck alot of it's value.
Beware those guns as an investment.
And finally,as you collect guns,you will need to store them securely and insure them for their full value ( which you will NOT determine-your insurance agents firearms appraiser will) just in case someone hears about your great collection and decides how great it would be to steal it from you and succeeds in doing just that.
Therefore,the less you brag about your investment and especially where you store it to ANYONE,the better.
Makes it much easier to see the bad guys coming when just those kind of questions start coming out of nowhere in a casual discussion about firearms.