Pennies are a way of saying that you have come by to pay respects to the deceased . ~ see discussion link below .
Any person may leave pennies on a grave but the significance is usually associated with a deep respect, love, and a enormous sense of loss.
If you mean a penny from 1960 the answer would be one penny. These coins are not rare and can easily be found be searching through pocket change. If you mean pennies from the 1960s the answer would still be the same. Again these can easily be found in pocket change.
Grave
If you mean pennies as cents, then it is $1000.00 or £1000.00 if you mean pennies from pounds.
Because it means good luck or lucky
pennies can be best used as such. How many pennies do you have?
Old pennies
The singular of pennies is penny. As in "I found a penny on the floor".
Stonehenge is not a grave.
if you mean grave is in where the dead rest its : tumba if you mean grave as in "shes grave danger" its : grave but you say the "a" like "ahh" and you say the "e" like "eh"
do you mean wheat pennies, they are 1 cent
no one knows, as his grave as not been found