Hot take, 6 months from now after a few code revisions and better callouts the game is going to be fun and a few people are going to want them and will pay $10k+ for them. Then folks will play it and realize how much better it's gotten and decide now they want one too and next thing you know, it's $12k for an ultraman.
It's just wishful thinking, but it happened on Stranger Things. It's also why I'm holding on to my UM at the moment, because I have the space and I just hope there's a chance at that.
Good luck with the sale.