What this coin looks like (obverse, reverse, mint mark location, special features, etc.):
The 2021 S Reverse Proof (Type 2) American Silver Eagle was produced in a two-coin Designer Edition set that also included the 2021 W Reverse Proof (Type 1) American Silver Eagle. A limited number of these sets were produced with only 125000 of each coin minted.
Coin valuation chart: Typical coin prices, values and worth per grade or condition - in USD