My kids could use a good split mech 'board. If you don't want it for yourself, I'll take it.
DataDesk is worse then Unicomp when it comes to innovation and seeing a new project to completion. They have been about to release their new Smartboard for years now.
To answer your question...these don't really have any collectible value and you likely won't be able to turn a profit worth your time. But if the keyboard is fully functional, it would be a waste to throw it away.