Related Clues:

• Sotheby's visitor
• North, perhaps
• Nodding one, sometimes
• Participate in an auction
• Word before 'beware!'
• One after the other
• Salesman's quest
• eBay user, perhaps
• Auction participant
• Trade fair-goer
• Department store employee
• Store employee
• Broker's quarry
• Purchaser
• Purchasing agent