The Johnson 300 models were only built in ’35 and ’36 during the great depression. Your serial number, 220731, makes it a 1935 model. 35’s aren’t quite as common as the ’36 models so you might take that into account. Location, condition, and demand are key in pricing. In your area, a survivor of this vintage might go for more than they would in Michigan say which has many old motors used only in fresh water.
A ’35 300 I just looked at is totally seized and shows signs of salt water use. It’s more of a wall hanger than a running motor and the seller is taking offers on it. I was going to offer him 70 bucks for it but he’s been taking offers for a while and now and is currently up to $450 CDN. That’s way too much for 37 lbs of corroded aluminum.
