So what if people sell platinum and gold plans for gil?

[Arky]

I am well aware of that, they work the same as the other metallic dyes that could be acquired in-game and just like those dyes people are selling the new ones in a roundabout way by putting up PF groups to sell the dyes by having a person trade you the item that they want dyed, you dying it then trading it back for the agreed upon amount of gil, hence why I called it a roundabout way of selling items.

Check out my reply above your post.