Amazon Warehouse Deals are where you can find great prices on open-box and pre-owned products. A new $10 of $50 order coupon code has just popped up that makes these deals even better. Just add anything sold by Amazon Warehouse Deals to your cart and enter EARTH10 in the promo code field at checkout to receive the instant $10 discount. You can pick up an Amazon Tap for just $74.98. There are also great deals on tablets, like the all-new Fire HD 8 for $41.96 after the discount. Look around and you’re bound to find something at a good price that this new promo code makes a great deal.