While self-emptying robot vacuums on sale at all were few and far between back then, almost every single robot vacuum on sale during Prime Days present can empty themselves. That includes Prime events not officially called Prime Day, like Prime Big Deal Days coming up on Oct. 8 and 9. (Though for all intents and purposes, it's October Prime Day.)

Prime Day, Amazon has deals on vacuum cleaners, up to 77 percent off. Including cordless vacuums, robot vacuums, car vacuums, and more, we found the best deals on cleaning devices from top brands, such as Dyson,

Many of the deals that Amazon is advertising for its Prime Big Deal Days this month aren't your typical holiday gifts. To be sure, the company describes the sales event as "epic deals ahead of the holiday season" (note the "ahead" here).