I don’t do the selling/trading part of that. Buy the new one and keep the old ones.I used to change pistols a lot as can be attested by my classified posts. Glocks are great and very reliable. I’ve been carrying either an Sig P365 or S&W 340 snub for the last couple of years. I’d be willing to carry about any Glock 9mm if it wasn’t these 2. It’s what you like the most, not some person on an Internet forum.