I have not purchased from rguns before.
I'm sure you are aware that underage people cannot legally purchase a handgun from a FFL/gun store. This is an old revolver, and could fall under the C&R rules. Discuss this with your parent/guardian.
Personally, i'd get with an adult and have a reasonable discussion about purchasing a .22LR pistol or revolver for target practice. The CZ kadet is a trainer for the 9mm cz75b and might have more visual appeal.