Ancient Minoan patterns are common with necklaces, bracelets, and rings in matching sets.
One can buy matching sets of bracelets, rings and necklaces.
So, bidding should be leisurely when bidders have little to learn from each other (say, when they're bidding on a new computer that's been widely reviewed) and intense when some bidders are far more expert than others (say, when they're bidding on a heart defibrillator for home use).