Hello, it is easier to choose an online cryptocurrency exchanger than a private seller or buyer, at least because such platforms usually have many users. You can find reviews on the Internet, study partners, find out information about the reputation of the exchanger, conduct a test transaction. Reliable cryptocurrency exchangers, such as the service at https://www.trustchange.com/ openly publish the rules and conditions of use, which is also important: the client can study all the nuances to protect themselves from unexpected troubles or problems.