NameBio does a very good job of tracking down and reporting domain name auction results. Domain investors aren’t the only people who use NameBio to find domain sales data. Domain brokers and domain name buyers use NameBio to get intelligence on domain names they want to buy.
Once a year in a domain name sale negotiation, a counterparty mentions the purchase price I paid to buy a domain name. I guess the prospect may think it’s a way to get a lower price and/or justify their low offer. This tactic works as well as someone mentioning that they’re a student looking to buy a domain name for a school project.