My Dad has a Ron Hill 11.75 x 14 three blade stainless. They go for about $225-$250 new on Ebay, and this one has very little use, and could use a good balancing. I think he's let you take it for $150-$175. I know everyone says three blades make too much tail lift and all, but I ran this one on my old boat, and it doesn't. And with all that surface area, it lauches pretty hard, too. Great ski prop.
Email me if your interested, and I'll nail him down on a price.