I’ve seen the "set" camera, housing , strobe, usb cable, carrying case & basically everything you need sell for between $800 and $900.
A moisture muncher is a little plastic capsule that is filled with dessicant to absorbe the moisture that may occur inside the camera. They are usually sold where the camera is sold.
Not bad considering the price of just the housing for a Canon EOS or other similar SLR . Look the price up on one of those and you’ll see what I mean.
SeaLife even includes a disc that has two different "basic" media editing programs.