My gym is 75.00 a month, but I have seen them for as much as 150.00 a month.
I paid $80/mo in NY, and I’m paying about $130/mo here in MD. It totally depends on where you live. Since CrossFit boxes are run off the affiliate model, each box is its own self-contained small business. The general feel will typically be similar, but the rules, routines, prices, programming, etc. can be fairly different.