The sole domain is not really worth anything as there's nothing to its name. If the site was ranked and had content then maybe, but nothing for now.
A domains value is in the eyes of the beholder and needer! In other words, if someone is looking for a catchy and brandable domain to do with themes then it could be worth x amount to them, but for me and the others above (by the looks of it) we have no plans for such domains/projects, so its not worth anything as just a domain with not content, no authority and so on. If you want to sell a domain like that, you need to do one of two things (or both): 1. Find someone who is looking for a domain in that niche/on that subject, as they are more likely to be willing to spend money on the domain if they personally find it to be catchy and worth spend x amount of their budget on. 2. Create a site on the domain, get it ranking, get it some quality back links to build its domain authority and even get it making some revenue. If you can do one or even both of those, you will find it much easier to the sell the domain, but as it is, you will just have to play the waiting game and hope someone looking for a domain in the niche spots your thread!