Amazon's 2017 Prime Day was a 30-hour event that brought with it a huge amount of deals. Some of these discounts were real winners, and others were completely lacking. As we prepare for Prime Day 2018 to arrive, we figured it would be fun to recap some of the best deals that we saw last year and see why we loved them.

Prime Day is Amazon's big event, but that doesn't mean that other retailers don't try to get in on the fun. We tend to see other companies match prices and try to one-up Amazon, and the competition is great for everyone. So, what was the best deal we saw last year?

The best-selling items last year were Amazon's own Echo Dot and the Instant Pot. It should come as no surprise that the Echo Dot was on the list. It was selling at $34.99, which prior to Black Friday 2017 was the best price it had hit. Now, we've seen it sell for $29.99, so anything more than that on Prime Day won't excite us again.

As for the Instant Pot, the large 8-quart option dropped down to $90, which actually made it cheaper than the 6-quart version was selling for. The Instant Pot is insanely-popular, so seeing a deal like this definitely made us (and a lot of other people) very happy.

DNA testing kits have been around for a while already, but it feels like Prime Day 2017 really brought them into the spotlight. It could be that we weren't following them super close, but the Prime Day discount made it extremely affordable to learn more about your past. Sure, it's not the flashiest product or something you'll use every day, but being able to gain that additional information is pretty awesome.

We also saw some nice discounts on gaming hardware, like the Xbox One, PlayStation 4, and more. Smart home accessories and phone accessories are often discounted, but we see deals on these items regularly.

Unlike on Black Friday, most of the deals that become available on Prime Day are somewhat a mystery. Amazon does generally give a rough idea of some of the deals you can expect but doesn't give specifics on products and pricing.

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