I have one used, complete set up as seen on the Mustang. Includes the ByroDrive,Quadra engine, 4 blade prop and spinner! Prop is 24"!!! Just flew this a short time ago!! runs great!! VERY scale!!! I also have a new drive!! No engine, prop or spinner but a complete unit!! It has been drilled for a different engine!! $100 shipped for the NEW unit and $300 shipped for the used complete set up!