Amazon Warehouse is a great source for finding deals. The department sells products that have been returned, have damaging to the packaging, or are pre-owned. The extent of damage to each product, if any, should be clearly disclosed on the product page. Issues range from open box to significant cosmetic damage and the discounts available vary depending on the condition of the merch.
Many of the items sold via Amazon Warehouse are guaranteed under Amazon's normal great policy, and are returnable in case of undisclosed defects or problems. While you should carefully check the return policy for each item you purchase, we've been happy (and possibly lucky) to be satisfied with our purchases, including some unfortunate but easy peasy returns.
The following list, from mid-March 2021, includes some great deals we found via Amazon Warehouse. Check them out but beware -- availability changes regularly as these are one-of-a-kind deals. See what's available today here: Drones & Quads: Amazon Warehouse Deals. At the time this post was published, each of the popular drones below had discounted open-box, used, or damaged packaging versions available at a discount over the regular retail Amazon price.