Re: Looking to buy a used outboard?
Almost any johnson or evinrude small outboard is a good motor, and the only brand that I would consider in your price range. The more horsepower you get, the higher it will be. I would not buy other brands because some of them are unreliable, and some of the ones that are fairly reliable may require special tools to work on. I don't prefer the '58 10 horsepower, or the 9.5hp OMC's, but they are good motors just the same. My favorite low budget motor are the '50s and '60s OMC's from 5.5 to 18 horsepower. If you look hard you can find one in your price range that has good lower unit seals and good ignitions that will last many years. Most will need work on the carbs, ignitions, water pump impellers, and lower unit seals; so that's something you should ask the seller about.
Exactly what horsepower are you after?
JBJ