(ANTECESSORS) is an antecessor + "s" in a .com. This is a dictionary word. To be clear a very, high intellectual person would think of such a word for a site. Anyone thinking of buying a domain like that clearly would know it is not for masses. So, you have a very small market where you can sell the domain name. I would value this in between 1-5$. This is just my view, you never know.
Best of luck