Yes these Chinese coins can be found in many areas. I don't think they are crazy valuable but I could be wrong.
Back in the late 70s I was living in Eureka Missouri. My brother came to visit me and we decided to break the heat of the summer by soaking in the river. We went to the river by what was THEN Times Beach. There was an old RR there.
While there my brother found a Chinese coin in the water, the coin was similar to that coin you show. I suspect the coin was lost in the 1800's when the RR was being worked on.