We picked up two Kindle Fires for DD#2 and SoIL. They will use them for reading and app games mostly, while they are in Japan, instead of bringing boxes of books. (They will be getting a Prime account once they move.)
I also grabbed Exploding Kittens. We like card games around here.
It did take a long time (and was a crap shoot) getting them into the cart. I was trying for a magenta and a tangerine kindle; ended up with the tangerine and black, and that took about 15 minutes of constantly clicking add. The card game, I tried for 15 minutes, and it didn't work, so I stopped. Came back 20 minutes later and it went in just fine.
Also bought a rice cooker, as my old one bit the dust last month. Not on Prime sale, but still a good deal.