I have the Acme props on my website
www.boarditup.com. You will not be disappointed with the performance or my prices.
As for boats. Resins, vinyls, motors, transmissions, etc. have improved over the years. Design has also improved. If you are money tight or starting out with a first boat, a used one makes sense. If you want the best and are just tying to be cheap, you will get exactly what you pay for.