This sells for $549 from Tesla. I've used < 10 times so it's still in great shape. I can help fit it on your Model S as needed.
The marketing photo:

All the pieces. I also have lots of spare parts as I bought a second fit kit when I lost a piece.

I'm located in the Cambridge, MA area. Will ship if buyer pays shipping.
The marketing photo:

All the pieces. I also have lots of spare parts as I bought a second fit kit when I lost a piece.

I'm located in the Cambridge, MA area. Will ship if buyer pays shipping.