pig in a poke

A pig in a poke is something you buy or accept without seeing it first or knowing what it is like even though it might not end up being what you want. Many pigs are purchased at fairs or farms while in a poke, which allows you to see them slightly but not much of them. While these pigs may be lower in cost, you never really know what you are going to get. By saying you bought something like a pig in a poke, it means you didnt see it, but accepted it anyways.