A number of years ago, I tried to buy a one word .com domain name from its original registrant. I did some diligence on the owner, and I learned he founded a well-known brand that was acquired by the second largest company in its field. He became a philanthropist, and money did not seem to be much of a factor for him.
While I increased my offer to buy the domain name over the years, we didn’t reach a deal. In fact, I don’t think he ever even provided a counteroffer to me. After several attempts over 5 years, I stopped inquiring about that domain name.
One thing I had noticed over the course of several email exchanges was his email address. The domain name he used for email was also exceptional, although he did not have a website. I believe it was the name of his new business or holding company that wasn’t consumer facing.