Hello, I just picked up a circa 1982 7.5hp 4 stroke Honda for my little skiff. The boats needs an impeller and a propeller. Impeller very easy to find, in fact, already ordered from iboats.com. My next hunt is to find an affordable prop. Biggest problem is I know nothing about props. So quite frankly, I may be compelled to spend more than I originally intended ($35-$55) if the benefits are there (increased efficiency more than anything else, speed is secondary). What are good sources for affordable props and what are the benefits of a more expensive prop? Thanks in advance.