Selling

"I am not sure I can tell you where I acquired it from," Ning said. "There is no point after all since I took away all that was there."

The woman's eyes narrowed. "You took all? What do you mean by all? The entire mine?" she asked.

"Yep," Ning said. "Of course, I've used it all in one way or another. That is all that is remaining."

"Of Lightning Essence crystal," the woman inquired.

Ning smiled. "Maybe," he said.

"If you have anything else of the same quality, our establishment will be happy to buy it from you," the woman said.

"I would be happy to sell it too," Ning said. "If I had any."

The woman sighed, realizing that he wasn't going to give away if he had more of these or not. Instead, she focused her attention on the crystal at hand. 

"For this, I can give you 4000 Fire Essence coins," she said. "Would you accept that?"

Ning thought for a bit. "May I ask what the conversion rate that is in this town?" he asked.