Nice brown color. To me that's what copper cents like this should look like. It's a good sign that the coin was never messed with.
It's true that they produce a lot of proof coins. But they also produce coins for circulation. if you peruse through this website and take note of all the "S" versions of each year. they production quantities are not as much as the other mints, but they still make circulation coins in many years. https://www.usacoinbook.com/coins/small-cents/lincoln-memorial-cent/ many will come here with questions like yours that get their information from YouTube and clickbait websites. Those places are mostly after making money off of the uninformed.
Looks like mine is valued at around .89 cents. I am going to keep it as the start to my collection, alongside my newly found 2019 W Quarter.
Being new to this hobby, it is the first coin I found in the last 3 weeks with an S mint mark. I also like the condition.
I used to keep every "S" mint cent I ran across when searching cents. I'm on the east coast and they aren't super common. I ended up with multiple rolls of each year 68-74. Finally I just decided to keep the nicer red ones and dumped the rest.
As a kid growing up in the east in the 70s, finding anything with an S was reason to celebrate. For whatever reason, 1968S - 1970S nickels were easier to find than the 1968S-1974S cents
