Hyper Beast skins are recognizable by the unique paint job depicting a vicious monster with an open mouth painted in psychedelic colors. The Hyper Beast family of skins currently has four members, and since each of them were added to the game at different points in time during various updates, these skins can only be obtained by opening various CS:GO weapon cases.
When it comes to the value, it depends on multiple factors such as the skin itself, the exterior, StatTrak etc, and it can range anywhere from a few dollars up to a few hundreds of dollars.
Check out other CS:GO skins families: