To buy it on a PS3 today, you must add funds to your account via the official PlayStation website or a PS4/PS5, as direct credit card purchases on the PS3 store are no longer supported.
This comprehensive guide covers everything you need to know about acquiring, installing, and optimizing the Jet Set Radio PKG on a modified PS3 console. What is a Jet Set Radio PS3 PKG? jet set radio ps3 pkg