You can hear all the American champions from 1963 to 2006 on the link below -
What surprised me is that while the auctioneers were chanting at a rapid rate, their sales rate was generally less than two per minute. You should hear the tobacco auctioneers – they can do 6 per minute!
Of course, a lot depends on the set-up in the auctionrooms and the customers. Specialist auctions are usually faster than general auctions as the clients will already know their limits.
I have done as high as eight per minute, but at the South East Auction, I prefer to do a steady rate of two per minute for the six hours. In that particular auction, any faster would be too fast for the bidders.