Merchant

The  is an NPC who appears when all players on a world have a combined total of at least 50 Silver Coins and there is a Home for him to live in. Once the requirements are met, the will move into a vacant home in the player's world and begin to buy and sell items.

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Trivia

 * It is possible to have both your Merchant and Clothier named Alfred, but this is very uncommon.
 * Before v1.1, it was possible to get up to three Merchants in your world at a time. The second Merchant required at least 3 players with 50, while the third required at least 5 players with 5.
 * The Merchant seems to be very interested in the Eye of Cthulhu.