if you speak about the salesman of beads Ali Cissé de Mopti, Mali, I assure you that it is a large very known salesman in West Africa. It passes by its shop a great quantity of very rare and beautiful beads but also many forgeries which he resells like authentic. Either it is unable to recognize false beads or he resells them in all full knowledge of the facts while exploiting its reputation
The subject is complex, it returns us to our capacity to judge the beads which we buy and of the trust which we have in the "specialists" who advise us