What is the value of a quarter that has the president's face on both sides?

This is a manually altered novelty item, known as a Magician's Coin, made by altering two normal coins and gluing the pieces back together, that sells regularly for a couple dollars. Use a magnifier and examine just inside the raised rim on both sides of the coin, looking for a seam where the pieces are joined, that can be on either side of the coin.