Watch out!
This seller is misleading. He only sells one part but is not very clear in his photo's and discription about it.
Only sells an RSX nothing more. Due to telling what one can do and changing colors one can easily be distracted and place a quick ending bid, way to high. It's not a upgrade for your old RSX, that you can simply download legally for free from the lego site so your RSX 1.0 works like an 2.0.
So watch out if you want to buy something from him. Also look at the shipping, insurance is separated but Requierd.