Underground Bidding

Exploration Stage: Foggy Backstreet
From: Mr. Black
Description: I was informed that an underground auction is being held today in the Foggy Backstreet. What if Carlos decided to attend this illegal event? The letter might've been an invitation to it. Get some auction signs, we'll go there disguised as bidders.
Completed: Great, we have the auction signs! We'll disguise ourselves as guests and get inside the hall. Rumor has it that at these underground auctions, you can even buy anti-fog crystals. I hope Carlos didn't come here to sell a few crystals from the City's reserve.