I have a Mercury Revolution 4 21p for sale. (Part Number: 48-857028) Like new condition, no chips, nicks, etc. Was just cleaned up and polished out at Hill Marine, I haven't used it since it was done. I had another prop over there getting fixed, so I figured I would have them polish this one out too. $350 located in Long Beach, or can take to Needles when I'm out.