I have a unique domain name I own that currently is not being used to its full potential and am possibly looking to sell it or collaborate with someone who may be up for a collaboration?
Why don't you write your entire domain here and its history? Domain is very important for every business, but it doesn't have to be crucial. However, most often one first has an idea about the business, and only then does one look for an adequate domain.
If you would give more details about it, you will probably get some useful tips, and instructions on what the possibilities are and what to do next with it.
It is also very important what your interests are, so logically the website or service you start should be oriented towards that topic.
Sincerely, I believe that a unique domain is not enough for someone to enter into business with an unknown person. The initial capital in that case cost only a few tens of dollars in the most expensive case and that is not an unaffordable amount for anyone with an idea.