1878 silver dollar no mint mark?

Although 1878 is the first year for Morgan dollars the Philadelphia issue (no mintmark) is very common but it has 5 different reverses for the same coin and value is a little different for each one. $17.00 to $30.00 is the retail value for average circulated coins regardless of the reverse. Above average circulated coins are $40.00 to $75.00 depending on the reverse of the coin. I suggest taking the coin to a dealer or collector for a better idea of value.