I'm going to have to disagree with the idea of opening up a merchant avenue of items for this game. In every game I have ever played which has been advertised as free to play but has a player merchant/ trader system to sell in game and cash shop items, the coiners drive players further into hopelessness of catching up.
Not one single game I have played has ever installed price caps on an open market system of trade to keep things in check. Greed will become a dominating factor in a players ability to reach the upper rankings faster.
For ex/ back in 2008, I played a game where an item would sell for 5 million gold. Fast forward to 2016, returned to the game as I heard it was under a new distributor and management. The international exchange rate if anything is better now than in 2008, the code for that item has been around since day one, so no added costs to providing that pixelated item. That very same item now to buy with gold is ranging from 25 - 40 million.
Elvenar already has enough speed bumps and road blocks to slow down or stop our progression, the game itself is having a difficult enough time of retaining players after the first few days before they even reach these speed bumps. If player merchant or trader sales were to be allowed, this will only drive more players away.
It will become a basic supply vs demand economic nightmare fueled by players greed and race to be king/ queen in the rankings. Especially when events come around when quests ask for spells or other items, prices will skyrocket like crazy and the lower players won't be able to afford them. This leads to the ever popular pattern of well, I was able to sell it for this much, lets try selling it for higher. Another event comes, people still need that item, it's lose out on the latest and greatest new shiny item or nearly drain all your coin for it.
Same applies to when a game releases something new, shiny and wonderful. Everyone wants to keep up with the Jones', the coiners know this, will acquire those items, as it's brand new, set ridiculously high prices on them. I have seen it far too often, players say "don't pay the stupid prices". Well 1) you can't fix stupid (those paying the prices) 2) if you want to keep up and remain competitive you buy it anyways.
It's all one big vicious cycle that will only lead to more players leaving because they cannot keep up.