I found this hobo nickel a few years ago I thought it was a throw away coin but did some digging on the internet and realized it may have some history I wrote to the Hobo Society and they said it was a authentic, which surprised me.
My best find so far was an UNC 50-D Jefferson nickel and second best was an EF 50-D Jefferson nickel.
My father found a couple of nice coins when we were coin searching in the 1950s. The most valuable was a 1917-S obv half in XF. I lowered its value by 2/3rds by some injudicious cleaning many years later. He also found a 1927-D Standing Liberty quarter that PCGS recently graded AU55. I got a 1938-D 50c in Fine in change at a cafeteria when I was in college in the early 1960s and also found an MS64 RD 1984 doubled ear cent in my wife's coin purse. Of course there was the 1914-D Buffalo in XF-AU with a bad rim dent below the date on the obverse. I "fixed" this problem coin with a pair of pliers. If you want more examples, just ask.
Good things are out there! About 10 years ago, I found a '22 plain, strong reverse, VF-25, in a $2 roll of wheats. While it would have been a lovely centerpiece for my modest collection of Lincolns, I flipped it to a dealer. About the same time, I helped a friend find a buyer for a beautifully toned 1916 SL quarter grading AU-50 which his father had found in circulation in the '60s. Both stories absolutely true.
Every single one of these dimes were picked out of change, every one silver. I have a little more than half that amount in quarters and about the same in halves not counting nickels. Have no idea how many there is. One of these days I'm gonna go through them all.
Ca. 1991 I was walking from Mission San Jose to the parking lot where I had parked my car. I was walking on dirt path and spied a dark coin peering out of the adobe soil and picked it out - a 1926-S Lincoln that likely was dropped long ago, and only unearthed again with the seemingly new dirt path.
About a month ago, I found myself a 1942/3 overdate nickel in my pocket change. Earlier this summer, got myself a 1909-O Barber quarter at the grocery store