Share A small silver coin that was struck in 17th century Boston just sold for $2.5 million dollars. The 1652 Massachusetts threepence is about the size of a nickel, weighs only 1.1 grams, and the silver itself has a value of $1.03 based on today’s market. This eye-popping auction price beats the previous world record price of $646,250 for an American coin that was struck before the American Revolution. It has also set a record sale price for any non-gold United States coin that struck before the founding of the…