Hello I recently found a jar of old nickles on the family farm using a metal detector. Just wondering what these coins could be worth. I have nickles from 1938,39,40,41,42. 1944 and 1945's and 1951,53,54,55. There was almost a full $40 in face value in the jar. There was also about 50 United States WWII nickles and 15 wheat pennies. Any info would be greatly appreciated