Hello Aquazi, here are the answers to your questions:
We will sell the Modular Menu System for $29.99.
Our solution does not include those menus out of the box, but you can easily create such menus with it. In fact, that’s the very purpose of the Modular Menu System, to create such menus easily just by using BP nodes. If however there is a high user demand for built-in audio settings and/or key binding menus, then we definitely might add such thiings to the system in a future release!
I hope that answers your questions.
Please feel free to ask any other questions you might have 