Ahhhh I wish I could tell ya but I have no clue. I mean you could check out what switches they have and see if its worth taking them all for a stockpile/sell but I doubt that would be profitable at all. Those are old mice, so I'd assume nothing is really usable. Optical sensor and such would probably be big bucks but not on the rollers.

Take my reply with a grain of salt, I do not know much about mice haha