Its probably an error, but Amazon has listed the $119.99 Microsoft Surface Touch Cover for only $19.99, which is a rather massive discount.
The 3mm thick cover offers a great typing experience for the tablet, with some saying typing is even better on it than on the bulkier Type Cover.
The Cover is marked as out of stock, but there is a small chance the giant retailer will honour the orders when the device does become available.
See the accessory at Amazon here.
Thanks Chris for the tip.