What is a value of an 1851 silver dollar with apache on it?

From your description, this is a known privately made novelty piece. It is NOT an official U.S. Mint issued coin. A real silver dollar dated 1851 is a Liberty Seated dollar. The obverse of the coin has the Indian head design that is similar to the Indian cents of 1859 -1909. The reverse has the denomination of 1 dollar and the date within a wreath. It has no numismatic collectible value.