You did well. In a retail store, it would bring between $45 and $75. The old wood planes fit almost any decorator's taste and goes with almost any décor.
In reality, those old planes required a lot of muscle to use. I'm guessing that the plane iron is at least 2-1/2" wide, that's a lot of wood to remove if face planning a board.. The gap between the cutting edge and the chip-breaker cap is set for average wood removal; it would be a narrower gap for finish planning or planning wood with knots or burl grain. When setting the cutter edge out the bottom of the plane, so the sharp blade is level, you would set it just so you could barely see the cutter sticking out to be able to use it with out your tongue hanging out... ;>)
Going over it with a light coat of "Johnson's paste floor wax", and then hand buffing it after it dries, will give it a deeper tone and a feel that will attract any buyer that takes the time to pick it up....and you'll get the higher end pricing, too.
Bill