Flagstaff and Tucson were far from each other. Most of the treasure hunters had heard of the Tucson Brotherhood's bullying, but had not experienced it personally until now.
Also, even though the Flagstaff treasure hunters had rushed over to meet up with Hans and Li Du, only Turis, Olly and several others were there. Not everyone had come along.
Apparently, some of them had come to Tucson before and knew how obnoxious the auctions here were. Even though they knew that Li Du was leading the team, they still didn't want to come. In the back of their minds, they knew they would be unable to get any unit and that it would be a wasted trip.
Although the Tucson Brotherhood was overbearing and abominable, they didn't want to incur the wrath of the Treasure Hunter Association. They still abided by the rules and regulations of the auction.
