So, I made a purchase the other day on equipment that is NOT neccessary for Calisthenics, but can improve your strength and allow you to do some exercises hard to replicate without.
It is good quality and seems to be a good price considering all the other sites I checked. There is a way to make your own for about half the price. Using plumber pvc you get at lowes. I contemplated doing that, but in the end decided to go quality over saving some bucks. I don’t plan on stopping calisthenics any time soon.