Re: used motors
CraigsList (online) and or localized want add papers like Uncle Henery's are the dumping grounds for most privatly owned used outboards. Boat dealers, marina's et al also have asuply but often don't bother with the older/limited value flavors.
It's true you can't gaurenty the history of an outboard but if you buy it in an area that is a hundred + miles from the salt, chances are it's a mostly fresh water motor. The other indicator is the cosmetic condition. SW turns outboards ugly in a hurry. i'e if she's clean and you buy it in the Adorondacks, you're probobly safe in knowing it was a freshwater only motor.