My experience shows that the so-called expert auctioneers have no expertise in their respective fields on many occasions at all. They cannot distinguish real items from fake. Sometimes it seems they have no idea about what they are doing, and their price estimates have nothing to do with the reality. Recently I read an article on smartshoppingschool.com and it correlates with my experience. It shows how unprofessional these "expert" auctioneers are. If you would like to find out more here is the link: https://www.smartshoppingschool.com/catawiki-online-auction-safe-haven-for-fake-jewelry/