What is the value of a 2004 A US 10 dollar bill with a red seal?

Please take another look at your bill. All US bills printed since the 1970s have had green seals. Red is used for part of the background of current $10 bills but the last ones with red seals were large-size United States Notes issued in 1923.

That said, a green-seal 2004 A $10 bill has no extra value.