There is nothing wrong with buying used firearms.  Some of the best deals you will ever get on handguns are used police trade ins.   In recent years, buying a used Glock can save  you $100-$200 dollars and if you factor in how much magazines cost, you can get a very good condition firearm and 5-8 gun magazines for the cost of just a new firearm which might only come with 1 or 2 mags.   There are now 4 generations of Glocks out there, but I really don’t have a preference.  If you like Glocks and the unique grip angle and  your looking to enter into gun ownership of one, buy a used one.

If you happen to have one that you either A. wear it out B. got one with a shot out barrel you can start over by replacing the Glock gun parts.   I suggest looking up Glock disassemble on youtube or get a Glock Armorers video  to replace the smaller parts, but replacing barrels is as easy as clicking your fingers. Glock barrels will run you $100-$200 in general and if you are fortunate enough to have worn one out.  I think wearing out a gun is an honorable as wearing out the frets on your Fender Bass, it’s a badge of honor.