Amazon Prime Day 2017 started early and you can save up to $30 on Amazon's tablets right now, but you have to act fast to get these discounts. Amazon Fire HD 8 is $30 off, meaning you pay $49.99 for the tablet that normally costs $79.99.Amazon Fire 7 is $20 off, bringing its price from $49.99 way down to $29.99. That's right: you pay less than $30...