A prop for less then a buck? yahoza!! any lower then this and HK will start to pay us to order!
These GWS props are great. Just be aware that there are two types of propeller offered - the DD and RD versions. DD is designed for direct drive applications (ie where the prop goes straight onto the motor shaft) whereas the RD is designed for use with planes featuring a gear reduction drive. This one is the RD version, although I actually use it in a direct drive application. The only negative is that the prop blades are weak at their bases.
Mine was black colored. Using it with DT-750 motor pulls out 1450g of thrust @ 20.7A on 3S lipo. What a puller! The props are perfectly balanced. They are requiring some sanding on the leading edge to avoid cutting your fingers. And yes, they are C.H.E.A.P.