I am selling a mid 70s (don't know exact year) 10-15hp boat motor for $300. It ran fine the last time i used it around a year ago, but have not tried to start it up since. I am very open to dealing and trades in this (guns/decoys/anything cool). It comes with a gas tank.
This motor has had work done to the carb before i got it, and the engine should run fine. I believe it is an Evinrude, but i am not 100% sure.
If there is any interest at all in this, i will try to get it running in a tub. I am in the Bozeman area, but live in Livingston. If you want to see the motor in Bozeman we can work out a time both of us will be in town. Don't hesitate to PM me with an offer or trade. PMs will get my address/phone number to drop by and look at it.