I can understand how upsetting it is for you. I had an encounter this year where i purchased a snake, that showed signs of IBD pretty soon after purchase. I was lucky the guy took the snake back(only to my dismay to re sell it). Im a nurse so had taken precautions with quarenteen. I had been stung quite a few years ago and had got out of the hobby for that reason until the bug got me again, its heart renching getting all your hard work put down. Even though I have strict quarenteen measures i will not be selling my snakes on for the next few years(even though they are over the danger period..thank god) just to make sure im not passing it on to any one else, its a shame other people do not think the same. good luck with any legal proceding if it comes to that, I sought legal advice in case of the worst, but was told it was more or less hopeless, im hoping no more of your snakes come down with it, good luck and best wishes