The best I’ve found is a 1910 penny in my yard. Worth about a buck.
Found a civil war coin in my yard, in absolute mint condition and made of some unusual metal since it was wartime. I think the last time I checked, worth about $150. The condition is absolutely remarkable, sharp edges and detail.
If it has the head of Lincoln on one side then it’s probably mine.............But, since you found it, you can keep it
As a teenager I once found an 1898 Indian head cent. I forget what happened to it.