how would anyone know if a particular name is being unused?
I have a couple of nice domain hacks and I use them for email and random services I run so the root domain appeared to be abandoned. I received so many messages from people wanting to buy them I just started pointing them at other sites so they would stop hassling me. I've had one of these domains for nearly 20 years and it's my main email address. I'm not selling because it would be a year long full time job just to update all my services 😅