Baruch Dayan HaEmes.

Sadly, and it is being reported much sooner than expected, the fellow who recently sold his illness to a non-Jew for 600nis has passed away from his illness.

interestingly, Walla mentions that selling an illness is not anything new. They quote Rav Cholek, the head of Ezer Miziyon, who says he asked Rav Kanievsky about selling one's illness to a non-Jew as part of the sale of chametz on Pesach. The probem with that might be that when you buy your chametz back after Pesach you would also be buying back your illness. It seems Rav Kanievsky responded that you can buy your chametz back and have no intention of buying back the illness and have no worries..
source: Kooker, Walla, Srugim