I had a transaction with @tibor recently and he sent some extra money for me to do another mystery giveaway. I purchased a United States coin. The first person to successfully guess the date, mint, and type of this coin will win it. You may guess multiple times, but you must allow at least three other contestants to guess after you have, before you may guess again. So in other words, you get to guess every fourth time. Get it? Ready? Go!
1878 Philadelphia Morgan Dollar? Thank you, @tibor and @lordmarcovan. This sounds like a fun game of Mastermind.