I have been shooting with M43 for about a year and have a GM1, an E-M5 and a handful of lenses. My son is a university student with no money who enjoys video and photography but doesn't have a camera currently. He is also a diver and would like to get an underwater housing for any camera he gets (which he of course has no money for). It seems like it would make sense for him to get a M43 camera because 1) I have lenses he can use and 2) the used bodies tend to be cheap. I know Panasonic has some cameras that are good for video. The GH4/3 are out of his price range. Beyond that, I really haven't kept up with all the Panasonic models and their features/capabilities. The 16mp sensor would be preferred and low light capability is of some importance. Are there any cameras that he could pick up used for $200 plus or minus that would meet most of his needs or at least provide a good starting point?