Prices at Amazon.com start from $5.87 (new) but third party vendor shipping costs can vary.
Amazon.com price as of 20 Nov 2017 20:59 CST - More Info
The Sport Propellers will allow for inverted flight while the 3D Propellers will allow for more advanced maneuvers while inverted. Like all performance upgrades there is a compromise to be made. Using the 3D Propellers with more advanced maneuvers will cause the battery to drain faster yielding shorter flying times with the stock battery.
- Sport Propellers (4): 200 QX