When will petticoat junction and mamas family come out with any more seasons on DVD for sale?

I can't answer for Mama's Family, but as for Petticoat Junction, you can to an amazon.com search and it will pop up. Apparently the entire collection is available, but I don't think it's made in the USA. It's a public domain issue. Most episodes are not in public domain, so the set is probably copied from pirated copies. That is all "to the best of my knowledge." As for Mama's Family, maybe someone on a message board on a Mama's Family fan site would be able to help you. Also, check Amazon.com. Good luck!