When I’m adding a BIN price for a name, the three main factors are: 1. The popularity of the word or phrase. This includes current trends, search volume and how many extensions that have been registered (with same phrase). 2. The extension itself. Is it a popular TLD, or does the phrase really make sense together with the TLD (example: night.club or domain.pro) 3. I browse similar sales, mostly using Dnpric.es and Namebio.