If you have done any type of research you will know that a GSXR 600 is pretty much a rocket ship. It’s a hard core super sport designed to do one thing, go fast. Because of that it’s favored by young men with small penises, an overwhelming sense of immortality and no patience to learn the skills needed to exploit 1/10th of its capabilities. I would be very cautious about buying a low mileage bike of this type as it may have had slightly more than a kickstand drop.
I’m confused by your comment about the MSF class not being enough but then wanting to buy a GSXR. The MSF class is a *basic* introduction on how to ride safely and the *basic* mechanics of riding a motorcycle. It certainly does not prepare you for riding a GSXR but hopefully puts you on the path to learning how to be safe while you develop your skills.
If you are looking for a 600cc class sportbike then look at the SV650 and the 650R, both recommended by the folks in the know here. That is a more realistic goal for you at this point. It is not just about respecting the machine you ride, it is about having the skills to control it and that takes time and experience.