First your coin needs to be assigned a grade. This is difficult for any of us to do without seeing a full reverse photo. But here are the PCGS Photograde standards. (Scroll to the left for the lower grades). https://www.pcgs.com/photograde#/Morgan/Grades Based on the obverse alone, your coin looks to be around G4 to me. The G4 value (retail) of an 1892-S Morgan dollar is $36, per Numismedia (coinprices.org). http://www.coinprices.org/cgi/usrar...e=any&searchtext=fmv&search4=any&proof=&plus=
Wellcome Alicia 728 nice coin I would guess that Morgan is a Good4 worth between $25 - $35! Nice find, keep it up.
Yeah, I'd say G4 grade. Maybe G6. "Book" price (Numismedia, linked to earlier) is $36. But @Collecting Nut's assessment of $20-ish is not off the mark, as it might be closer to what you'd expect to pay in some dealer's pick bin. So $20 on the low end and $36 on the higher end.