Amazon’s massive Prime Day 2017 shopping event is now in full swing, with the fun having kicked off earlier this evening at 9:00 PM ET. But wait, isn’t “Prime Day” just one day, you ask? To that, we say don’t look a gift horse in the mouth, and enjoy the extra three hours of Prime Day discounts Amazon has made available on Monday evening.

This is the third annual Prime Day event, and Amazon’s sales on Prime Day have historically outperformed Black Friday. For Prime Day 2017, Amazon is doing everything in its power to ensure that the trend continues. We’ve seriously never seen anything like some of the sales happening right now on Amazon, which is fantastic for consumers. Of course, there is one potential downside: The best deals are going to sell out fast.

In this post, we’ve identified 10 killer Prime Day deals that are at serious risk of selling out. Needless to say, Amazon’s insane sale that chops 50% off the price of a brand new Amazon Echo speaker is at the top of the list — $89.99 for a new Echo is completely unheard of.

Two other Amazon products that will almost certainly sell out are the Echo Dot and Amazon Tap, which are also both being offered at deep discounts. And let’s not forget the brand new Element 55-Inch 4K Ultra HD Smart LED TV – Amazon Fire TV Edition, which is somehow on sale for just $399.99!

Of course, not all of the killer Prime Day sales at risk of selling out are Amazon products. Definitely be sure to check out our full list below.

Key Prime Day 2017 Links:

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