Hoping someone can help me..... My father, who was an avid boater, passed away a couple of years ago and when cleaning out his garage I found a Land and Sea torque shift/auto pitch prop. I know nothing about props, but it looks like it was barely used, if at all. From the research I've done online, these props are no longer made, but they seem to get great reviews. I have no use for it and would like to sell it on ebay, but I need to know what info to provide. How do I know what type of motor it will fit on (it has 15 splines)? Do they come in different sizes, and if so, how do I measure it correctly? Do I need to know the pitch range? What would be a fair price to ask? Any advice would be greatly appreciated!