I am selling a SONY RX100IV and Nauticam RX100IV housing set. Both are in excellent condition. They have been through around 80 dives, never leeked. The RX100IV is my dedicated UW camera, so almost live in the housing with no dings and dents.
The Pro housing set comes with the dual handles and a shutter release extender. However, the shutter release extender is not usable now. If you want a new one, it costs 60 USD.
Selling the whole set at 1000 USD. Located at Seattle WA. PM if you are interested.