The crafter puts items in resale to be sold to other players, the obvious intent is that the purchaser will use or gift the item to a player that will use it. So the items have already been priced at what the crafter deems a fair price. Purchasing and then reselling others crafts at a higher markup can price these items out of reach for the intended consumer, which may violate the second rule regarding in-game courtesy- "You may not hinder another player during his play." I don't claim that this is the view held by any WG official, and I've never heard of a ban from reselling others crafts. Although I have heard if toon consistently does this on Silan they will be spoken to, I assume since it is a much smaller market.
So I would say it is wrong because it manipulates the market prices at the expense of the intended consumers.
So I would say it is wrong because it manipulates the market prices at the expense of the intended consumers.