Re: You are gonna love this question...
I have seen plenty of 1980s 70 HP-90HP motors running for under $1K...If you are going to pinch pennies you will have to learn how to diagnose/repair your motor...If I am not mistaken the motor in question is electric shift, Is that not right??? I can usually pick up an old boat, motor and trailer for around $1000-1500...but most motors will at least need a full maintenance.
and I did have a 69 40 HP sea horse once...piece of junk IMO..even when it ran it drank fuel like a sailor on leave...then the electric shift went out, I could not give it away.
I had a 1988 Mariner 30HP motor that ran way way way better, had almost as much power, and gave 12 years of reliable service until I sold it..as far as I know it is still running strong. I am sure that there are some 40s and 50s still going strong also, but not without the careful attention from a skilled mechanic.
In the 80s and 90s motors (auto & Marine) saw some real improvements IMO. The machine work on the block, rods, pistons all was done to lesser tolerances, electronic ignition was invented and IMO is way better than points any day..also they got rid of the crappy electric/assist shift that was just waiting to leave you stranded miles from the dock. Now they have went too far with EFI/DI motors..
.I like simple and I believe the 80s and 90s carbbed motors to be very simple to work on and keep running and to be very very dependable. also the overall cost difference is almost not even worth mentioning..generally speaking if you have an vintage motor you have it because you like it, not because you cant afford a later model motor. come on guys fess up, you know those things have certain parts that are much harder to get to also. you got to pull the flywheel on most of them to do anything beyond change a spark plug.