1. Tibetan friends should familiarize themselves with their collections before selling them. Collectors must first understand the market situation of the collection, and so on. They must be very familiar with their collections, and they must be clear about their flaws, ages and so on. They should also be wary of illegal elements tampering with the collection to prevent switching.
2. First of all, you should know the latest market of the collection and sell things. Of course, you must first know how much you want to sell now and whether it will be worth it in the future. Buyers will certainly know this, and they want to buy at a very low price. Buyers and sellers are actually conflicts of interest. Don't think that profit is good. The most important thing is to know how much the collection can earn at most. Collectors who do not know much can catch up with this knowledge.