Manipulators prawl

"I am willing to buy the nine Keys for three Seals of Destiny!"

"I can give you a Trait Stone from the World of Inbreeding. It can give you the Son of Darkness Trait!"

"I will give you a Spiritual Sword Aura Art. Sell the nine Keys to me for those."

"I will pay with a magic scanner," the Winged Humanoid shouted. "It can help you know the abilities of people at Tier 3 and below. It will be mighty useful to you!"

Mark licked his lips as the demons fell into a heated argument between each other. They spat and pushed, all filled with a sense of desperation. 

Some didn't even have anything to sell and still wanted the Keys, it was their hope of survival. Some were waiting for a better moment to bid high. Some might have also seen through his lies. But Mark wasn't worried about them selling him out.