https://www.usacoinbook.com/coins/2777/half-dollars/walking-liberty/1916-S/ $122 according to usa coin book
It really depends on how you define "good condition" Joseph. And even if you mean it literally with the "good" being the grade - things can still vary greatly because it then depends on who is doing the grading. And yes that even applies to the TPGs. And if it were me, I'd say it especially applies to the TPGs because they tend to be quite lenient with coins like a '16-S Walker. This is why we usually ask folks to post pictures of their coins so that me may judge for ourselves what the grade of the coin actually is.
Good condition on the Sheldon scale is actually bad condition. Perhaps your coin has been cleaned. (that's bad) Good clear close up photos of both sides are needed for even a guess at value.
I believe you'll find if it currently were graded G-4 by PCGS, the retail value listed for the coin is $90.
You should be more specific about the condition. Good could mean the actual grade "good" (g04-06) or to some maybe vf20. If you mean the grade good it is about $90-100. However, if you mean, say, vf20 (for the sake of argument) it is about $500. You should check out PCGS photograde to determine your grade, then go to the price guide to check the value of your coin in that grade. Also be sure to check for problems like scratches, dents, rim damage, corrosion, PVC damage, and evidence of cleaning on your walker (assuming the coin is yours), as these can affect the value significantly. Also, if it is yours, pictures would be good. Here are the links to PCGS photograde and price guide: https://www.pcgs.com/photograde/ https://www.pcgs.com/prices/