I just noticed this over at Heritage, and while the auction is long past--I'm still baffled as to why collectors would run this up to nearly $24,000.
After all, this is the
Snow-2, and not the very rare, confirmed overdate
Snow-1. Someone easily paid
10X the market value at the time.
So, perhaps the auction description offers some clues?
Do you suppose the buyers were confused--and why? It sure pays to
read carefully. 

Detail of the coin, in case there's any doubt:
