The value might be in how much if any they generate in parking. Since google sees money the same as m-o-n-e-y (so I am told) then I would be working on my seo for these and then if the domain is generating cash, it would be easy to sell.
good luck, gary.
ps- I read a post this week where someone stated that about 80% of the w-o-r-d-s.com are all gone. Must be something there... Keep thinking outside that box, sometimes it pays off nicely!