I use most of prime's other services (streaming, books, music, internet storage etc.) so to me it's still very economical. Also, I'm incredibly impatient on shipping and the free 2 day just is more satisfying. I have seen plenty of cases where there are non prime stores on amazon selling products for lower prices, but Amazon is very good at alerting the buyer of this and it's easy to navigate to all available sellers. I can think of only a few times I've ordered a product from a non-prime store due to a lower price.