Circulated, the 1884-S Morgan is common. In that grade, it's only worth melt which is currently $20.82.
But, with the right pizazz in yer listing it should at least pull $27+ on the Bay. then subtract $3.50 in fees & you keep an extra $3.50.
You can sell it to a dealer for $10 or sell on eBay and likely break even. I say if you only got the one, just keep it. Perhaps carry it around in your pocket, make it a good luck charm (if you are superstitious that is).