A one-of-a-kind dime minted in 1873 sold for $1.6 million at a Philadelphia auction last night, reports AP. The coin depicts a seated Lady Liberty, and it is thought to be the lone survivor from a one-day minting of dimes at the renowned (in coin circles, anyway) mint in Carson City, Nevada. Another 110 coins also went up for auction, one of each coin minted in Carson City before its facility closed in 1893. Total haul: $10 million. Total face value of the coins: About $600, according to USA Today, which has more explanation on why collectors were so bowled over.