How much does this cost to the nearest dollar?

Radiolink R6DSM 2.4Ghz 10 Channels Micro RC Receiver SBUS/PPM for Mini FPV Racing Drone, Quadcopters Aircraft, AT9S AT9S Transmitter
Excellent Anti-interference with DSSS&FHSS pseudo random algorithm to give R6DSM with excellent anti-interference ability. 10 Channels Support PPM/SBUS signal output, ideal for most aircraft. Make sure menu SYSTEM CH selection is 10CH when it works with transmitter, or it won't work well. Fast Response High resolution ratio of 4096, the stability of 0.5us, to provide a quicker, low-latency connection for the transmitter. Mini Size Only inch and fit a wide range of RC aircraft models, like mini

Price is $
Price: $17.99