A keycard is around $8,500. And the controller is about $200 on a "T". Have a 9400T and 9400 tire, and demoed a 9520T. 9400T seems to have more power than the 9400 tire, I thought the 9400T didn't seem all that different than the 9520 at all. But I didn't run them side by side. Ran the demo for only 7 hours or so.