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I have to apologize because I accidentally deleted your mail in game. I meant to click on reply and clicked delete. I don't remember who asked the question but a certain player was wondering if set items temporarily released in the gem store would be worth gold later on.
The answer is a resounding yes. Anytime dyes or pets are sold for gems then you can almost guarantee that they will shoot up in price the moment you can only trade them to other players for gold. Might take a few days, but usually within a week to a month the price has shot back.
This happened with white dyes a while back, in fact you could have made around 2-3 gold per dye!