Update: This deal is expired.

Amazon Warehouse is where Amazon sells used and open-box products at a discounted price. Right now a selection of "back-to-school" supplies are being discounted an extra 20%. This seems to include everything from mice to headphones to keyboard cases. The first price you see is the "used" price. Once you get through to checkout, you'll see the 20% applied in your order summary, bringing the price down even lower.

All of these will be in very limited supply.

Here's a few pretty great selections from the list:

If you'd prefer to get great deals on new gear, try this Gamescom deal currently running on Amazon.

Check out the full list:

See at Amazon