YMMV automatic 20% off discount on some Warehouse Deals items

Over 24,000 used items offered at Amazon’s Used websites (aka, “Amazon Warehouse Deals”) are participating in an Earth Day promotion that automatically gets you 20% off their current prices. Only select items are eligible, and only those that Amazon itself (in this case, Warehouse Deals itself) is the seller. Things offered by 3rd-party sellers are not eligible. No coupon code needed, eligible items are discounted automatically and they show a 20% off marker when you look at the individual listings. Since this is an Earth Day promotion, it should end after Earth Day or so.