Board Thread:Wiki/Forum Technical Support/@comment-25330335-20150329025639/@comment-27723099-20150403010301

Glflegolas wrote: That's exactly the idea behind creating this list. Why buy something from a player for 5 coins when a trader will sell it to you for two?

Glflegolas (admin) Send a Messenger 23:32, March 31, 2015 (UTC)

Because either the trader is too far to walk (and you are lazy or in a hurry) or because you don't know it (trading is hard in MC, so let the traders that extra profit).