Pbtech is one of the major retailers. Their reputation is so-so (in terms of service level and dealing with warranties) but at least will give you a good benchmark on what you can buy and it’s cost.

Assuming this is the few years old model (G513QY) it works great. Been running it primarily on Arch BTW for the last few years and there were some challenges initially but all the drivers etc. have caught up. Only thing I’m still stuck with is getting VR running in Linux, but in theory that’s possible.