The Amazon Echo has just gone on sale for Prime Day. It’s down $50 off its retail price. The Echo is my favorite Amazon product next to the Fire TV. If you missed out on the $99 pre-order window, here’s your chance to get it for not much more. The advancements and improvements to the Echo have been happening at a faster pace than I’ve seen for any other Amazon product. It seems like every other week it gains new features that add value and expand its capabilities.