You're eligible. Since you already have Huluflix, it might be redundant to get Prime. However, if you frequently shop on Amazon, then the free 2-day shipping will easily recoup the subscription cost. I only use Prime for the free shipping (and discounted 1-day shipping), and it's extremely convenient. But if you don't shop on Amazon enough to really utilize the free 2-day shipping or the other services Prime offers, then you're best off saving your money.
9/25/15 at 4:28am