Eh. I've seen this site before, not impressed. Throwing away money on stuff you don't need, even if it's just a few bucks, is still throwing away money. Before I got my Prime membership, I used to hold things in my cart until I had enough to reach $25. You can buy ANYTHING on Amazon. A couple years ago I realized you can even buy art supplies there, which I used to pay more for elsewhere.
I like my Prime membership because it gives discounts on shipping even when buying from a 3rd party seller (fulfilled by Amazon). There's also a free month trial. Additionally, you can borrow books from Amazon's lending library with a Prime membership.