On the used market here, I see them selling for about $350 fairly frequently. If you want a certain caliber or model, you may have to wait until it appears.
I have owned a Glock 26 only. I had it several weeks before I traded it off. I wanted to see hat the hubbub was about, so I found one and bought it. The pistol was accurate enough, never missed a beat........but then the accuracy quickly went away. After a cursory look, I realized the rear sight was moving back and forth. Then I realized the pistol had plastic sights.
To this day, I have a hard time believing they would put plasic sights in a defensive handgun. I suppose the sights work well enough for most customers. You rarely hear of owners complaining about this. It struck me as being cheap though, cost cutting above and beyond what was needed. Cast aluminum or steel sights could not have been that much more expensive.
Frankly, I'm kind of surprised there isn't as big a market for Glock sights as there is for 1911 gizmos. I guess it doesn't matter, and the plastic ones work OK for most shooters. It just got me wondering what other cost cutting measures were done.
I found the trigger to be spongy. The grip angle was wrong for me. I'm guessing the one I owned was a second generation, but I'm not certain. It did not balance and carry on my hip well. Perhaps a Glock with a longer barrel would have. I did not have a problem with limp wristing.
I owned my Glock at the time many Glocks began to have frame rail separations. Glock was not responding to it's customer's needs during that time, and that bothered me. Glock took care of their police contracts, and told most civilians to suck eggs. Finally, I find the "Glock Perfection" advertising hype disagreeable, but that is probably because I am an old curmudgeon, and Glock owners keep bringing it up.
My Glock 26 was, however, reliable for me while I had it. One thing is certain......If you buy a used one for $350, you will get your money back if you don't like it. Try one and see!
Let's not turn this thread into a flame fest.