Hi,
I'm selling a OpenRov Trident. I bought it used, in a not working condition and repaired it. Sadly, I was not able to get it tight, without filing the screw holes with epoxy. Now, it cannot be opened any more (but for normal use, one doesn't need to open it), and the depth sensor stopped working. Otherwise, it is working fine. I sell it with 25 m tether, the surface unit for 250 USD (+ shipping from Bremen, Germany) or with the controller (JXD 192K) for 350 USD. Please ask, if you have questions.