We already previewed some of the big deals Amazon will be rolling out for Prime Day, but Amazon let us know about one more: The Amazon Echo will be available for just $129.99. See also: Amazon's Prime Day will offer a 40-inch, 1080p TV for $115. That means you can snag the Echo, which earned a Mashable Choice award from us when we reviewed it in February, at a $50 discount compared to its normal retail price. That's a huge deal.