That outboard is an Eska made motor. Eska made outboards to be sold as Ted Williams (Sears), Wizard, some Sea Kings, and others, but each of those also sold outboards made by other manufacturers at different times.
The ignition systems on the two cylinder models have a poor reputation and the parts are expensive for that size Hp.
I would imagine $200 for a running motor, but there are more reliable motors out there for a few $ more.