Anyone know where to find bixpy propeller for kayak used?

Looking to buy one used but cant seem to find it anywehre, such as craiglist or marketplace.  Even in forums here.  Anyone have suggestions or come across where they were able to buy a used one or brand new is only way to go?

bixpy kayak propeller:  https://bixpy.com/bixpy-outboard-kit-for-kayaks/

Probably hasn’t been that big of a market new or that many laying around to be sold used. You’ll probably have to watch for a while.