For those who have ordered shrimp from Amazon

I want to order some shrimp off Amazon. (My LFS only has cherry shrimp)

There are a few sellers to choose from and they all seem to have decent reviews… and free shipping (how?) Plus some packages, like a skittles pack for example, are cheaper than what I would pay at my LFS.

It all seems too good to be true. So once the weather gets better, I want to place an order.

Any recommendations for which Amazon seller? Or one/s to avoid?