If you mean a $2.50 Gold coin dated 1908 retail values for a circulated coin are $185.00-$250.00 with uncirculated at $350.00+
Current retail value for a certified 1908 Half Eagle is about $5,000.00 in MS-64
Value runs from $185.00 to $250.00 in circulated condition.
One dollar.
No US $1 coins were struck in 1908, look at the coin again and post new question.
$178.00-$312.00 for circulated coins.
Only Liberty Head half eagles were made in 1904. The first Indian Head was made in 1908.
Look at the coin again. No U.S. $1.00 silver coins have the Indian Head design.
The coin is a Sacagawea dollar.
Depending on the grade, retail values for circulated coins are $178.00-$300.00
In order to give an accurate estimate, the coin should be seen. I suggest you take it to a coin dealer and have it appraised.
A "one dollar" coin has the value of one dollar!
A 1908 Saint-Gaudens $20 Double Eagle coin with no motto on reverse in a mint state of AU-50 is worth: $975.00; if this coin does have the motto on revese, its value in a mint state of AU-50 is also: $975.00.