Good evening! I happen to pass by a pawnshop this morning and saw these two silver dollars, 1921-S Morgan and 1926-S Peace dollar coins. They were selling it for $25 a piece. Was able to get a vet discount and paid $40 for both. Looking at the condition of the coins, did I overpay? If the coins met the expected weight and pass the magnet test, are there additional ways to tell authenticity of Silver dollars? Thank you!