This ^^^^^ More then likely wild caught and more then likely not given the medical treatment he needed when they had him. Trouble is you do not know what the cause was. Some parasites are contagious to other chams. Some are worse then others. If you are planning on getting another one... If it were me I would strip the cage throw away anything porous. Do a thorough intense cleaning on the cage. Then start with all new plants and branches inside.Underground reptiles.
So sorry for your loss... And I would not worry about adding the picture. There are no rules against it. And it is not like it is something we have not seen before.