Talking to the Craigslist guy about what it would take to get the $200 motor up and running, he thinks as far as parts go looking less than $200.
So that means basically a $400 + My Time for a 30 HP old school vintage Johnson. That is VERY tempting.
"Parts should run under $200.00 for EVERYTHING needed, carb kit, water pump, lower unit seal kit, new coils, points, condensers, etc...
Here is a link to parts to do the ignition. If you got two coils and one tune up kit you would have everyhting you need t $73.00: https://www.nymarine.ca/ignition.htm
Then 378891 water pump impeller here for $25.00: https://www.nymarine.ca/impellers.htm
SK7 seal kit here for $35.00 https://www.nymarine.ca/sealkits.html
382053 carb kit herre for $25.00: https://www.nymarine.ca/carbkits.html
Over the years, Peter McDowell at North York Marine up in Canada has become kinda the premier go-to guy for me for parts. These are his links above, but you can check out other stuff, as well as resotrations at his website www.nymarine.ca PEter is a cool cat and I have enjoyed working with him on a few projects.
Points gap is .020, if I recall right. Spark plugs would be champion J4C or J6C as I recall, gapped at .035
The only awkward items that might require special tools, (which I have) are the shif-shaft bushing removal and reinstallation, and the flywheel pulling. YOu can google search those either for the special tools like I have, or there have been some clever folks who have designed their own tools to do these two things. Otherwise, it is totally sraight forward."