My most monetarily valuable treasure find is a 50 cent silver coin, and the value is in the silver because the coin is badly abraded.
However, there is a local treasure story from the early 1900s I have heard from several sources, one of whom saw the hole where the treasure was dug. The treasure was gold coins from the late 1600s or early 1700s, a military payroll that was buried when an enemy army was approaching. The finder discovered it in a field about 200 years later while he was plowing. The finder was an employee of the farmer who owned the land. The finder spirited the coins away secretly at night with the help of a horse, wagon and friend. These two people then began making annual trips together and returning with expensive cars. Their farms became very prosperous, with the latest machinery and big buildings. One family member peeked through a window into a room the finder kept off limits, and saw him handling a pile of gold coins on a table. The primary finder shared some of the money with favored family members but pointedly left others out. The owner of the farm where the find was made heard about it, asked for a share, but was refused. Neighbors did not like this person thereafter and many in the family became bitter about it. Three generations later, there is still bitterness when family members reminisce. And the reputation of the finder among his neighbors is bad, even after he has been dead many years.