The price is 45 EUR plus 10 EUR shipping in Europe, or 15 EUR to USA/World.
You get the alloy ring, the weebill adapter and all screws needed. Total weight: 132g
You only have to get the smallrig handle and other accessories like a set of allen keys.
I suggest the screwed handle, not a nato handle, since you have more room for your thumb to reach the joystick.
For example, this cheap one would fit perfectly.