I think it would be a third generation just like the current models. Personally, I wouldn't see a problem with it. If it's that good of a deal, I wouldn't let the age hold you back unless it hasn't been well taken care of. I would look into some spare parts for it, such as a trigger spring and recoil spring. I think my G17 was purchased in 1999, and my G27 followed it shortly after in 2000 or 2001. No problems out of any of my Glocks. I do take care of them, store them with the trigger back, and keep some small spare parts for all of them JIC.