I'd look into getting a CAN yield monitor system for the 9500. Then you can run any of the touch screen monitors and get support if you need down the road. 


The old stuff is cheap but hard to use. Good luck finding a card reader or computer that can read the really old big cards. Heck some of the cards had an internal battery that could go dead. 


If you truly want to use the data after harvest (maps, reports, Rx, etc)