It's not clear from your description, have you actually offered the $50-100K?
I have found my client another domain that they are happy with.
how is that bs ? I have a vanity domain that I'm not interested in selling.
Otoh, if I approached Marissa Mayer to buy a domain she owned I wouldn't consider "I don't want to sell" "BS".
If I approached McDonalds and wanted to buy "hamburger.com" from them (hypothetical) and they said "don't want to sell" I wouldn't consider that BS.
But this company, that is their business (domains). It is BS.
Lastly, If your vanity domain name is (hypothetically once again) "nowblog.com" maybe you aren't interested in selling it. If someone offers you $100,000 you might be interested, correct?