John I can't view your picture but from your description I would say they have root rot,
I don't think I would have repotted any of them. I probably would have just let them lay out and dry up a bit.
MILTongues hold their water in their leaves,, as why one can neglect them for so long and they will be okay.
The seller from Ebay should have packed them in only newspaper bare rooted. I hope you can find some more in a nursery or garden center where you live. They are slow growers but will get very tall if taken care of properly: indirect light , cactus
soil mixed with houseplant soil is what I've always used for their soil. Good luck and keep us updated please.