Black Market Shop

There are many areas of the game where items are incredibly hard to gather and nobody will sell them for any price because everyone needs them. My suggestion is to create a shop where some of these items are sold. Ideally these items will be sold in Certificate form if they are not stackable, have a large quantity to buy, and users would pay a premium for this convenience. Something to keep in mind is that we don't want to interfere with anyone who skills for money and make it so anyone who uses the black market would find it impossible to make a profit on selling things. Pricing would be 2x-10x the real market value.


Here are some examples of things that would be in the shop:
Feathers 1000gp 10,000 quantity (200gp in regular store and limited quantity)
Rune Essence
Rune Ore+
Coal
Uncut Dragonstone Gem+
Herbs
Magic Runes
Magic Bones

In a game with thousands of users, if I advertise that I am buying X item for 5x the market value people would be rushing to get in line to sell. This shop would serve this purpose.

i like it.