Hiya~
I wanted to talk about the Shaman Hair Decoration / Dark Knight Mask (headgear - Upper). These items have been around for a long time or so I heard, and were only obtainable if you bought the Ragnarok DS game which included a code. The code then provided you an item and you could seek out an NPC called "Strange Woman" to do a quest and get your unique rewards based on the Ragnarok DS Story.
I would like to suggest to make these two items into Costumes that are ACCOUNT BOUND, as this will ensure they are not sold/traded. For those who already possess the Shaman/Dark Knight set, they can go to the Strange Woman at Rae/Rachel and convert their Shaman Hair Decoration / Dark Night Mask into a Costume by doing a quest, similar to the other headgear quests when converting them to their costume alternative. The downside would be that you lose the Shaman Hair Decoration / Dark Knight Mask as it becomes a costume item, so you can't use it as a set anymore with the Ring and Earrings; or it just creates a Costume: Shaman Hair Decor while also keeping the original Shaman Hair Decoration intact, giving you both the original item and the costume version. The same would go for the Dark Night Mask.
These items were exclusives and they would be amazing to have as costumes due to the uniqueness of the sprite/skin.
If this is possible, can the same be done to all other Promotional Code Hats that are account bound? The most amazing part of Ragnarok is the amount of costumes available and how you can play around with the appearance of your avatar. I love this feature
and it is what keeps me excited to play Ragnarok, besides the many other great things about the game.