I noticed http://northcarolina.history.museum/ in the listing. I clicked it, and it resolves to an IP that is no longer routable. http://asheville.art.museum/ suffered a similar fate, and http://ncmls.durham.museum/ immediately redirected to http://lifeandscience.org/.

I imagine a lot of these were purchased as "Hey! There's a .museum top-level domain! Let's buy it! ...You know, we should probably write this down somewhere."