US Marshals: Bidder Turnout in Second Bitcoin Auction Declines Sharply The US Marshals Service, the federal agency tasked with managing the sale of the 50,000 BTC confiscated from Ross Ulbricht made an announcement that this bid attracted 11 registered bidders who placed 27 bids. This is in contrast to the June auction which attracted 45 registered bidders who placed 63 bids.