You are definitely not getting a bargain.
If I were you I would focus on a 1977 or later to avoid the points and condensers. Just my preference of course. That motor is useless for trolling so if you want to do any of that, look for the 1977 or later models.
Just my opinion of course. I do own the exact motor by the way. If you buy a 1974 to 1976 9.9Hp/15Hp Evinrude and you are fanatical about maintenance, which would include changing spark plugs every two years for sure, removing the flywheel and re-adjusting and then cleaning the points, every three years (or any year you skip using it for a season) and decarb the motor at the end of every season,... and do not troll, the motor will serve you fine.
Or you could find a 1977 to around 1990 and basically just change the lower unit oil every so often and the thing will last you for 50 more years no matter how you use it.
