Re: 2 stroke outboard
For that price, it should be in great shape, no corrosion, and a fresh water engine, as a used saltwater engine will have to have been expertly maintained to look good at this point in time. Look at the pull rope to see how frayed it is for an indication of how much it was used. Even though many here are good at fixing these wonderful compacts, if you are wanting a runner, and not a project, it's worth it to pay a little more for a nice engine.
At a minimum, you should try to find one that has has a recent lower unit service(new gear oil and impeller) and tune up(new plugs) and that starts and runs well. If the owner just quit using it and stored it, then you will most likely need to have the items above done, and possibly clean the carb. The 1980 9.9 /15 engines had a habit of blowing out the Power Pack ignition module, especially if pulled over with the spark plug wires dissconnected, which damages the power pack.