Auctions are very common and frequent in the U.S. Not many auctioneers have a hammer to bang on a table and yell "Sold!" Usually each person bidding has pre-registered and is given a number on a card. You bid by showing your numbered card. The auctioneer (or assistant) remembers the last bid and if there are no more bids after a fair warning....you (your number) has bought the broken lava lamp.

There are usually three types of auctions: Estate, Living Estate and Reserved.
An Estate auction comprises the household goods, and sometimes includes the home, of a deceased person. A Living Estate sale is a person or group of people selling off their possessions prior to moving into a small apartment or leaving the country to start again somewhere else. A Reserved sale can involve any item but the buyer must bid above the minimum price established by the seller.
My wife had a very nice one-horse buggy that used to belong to a doctor who used it to make house calls about a hundred years ago. She would hitch a gentle mare to it and ride around the countryside. When she married me, the buggy just took up space in our garage so we took it to a Reserve sale where horse tack, buggies, wagons, cattle were offered for sale. The highest bid was $400 and just before the auctioneer said "Sold!" she hollered, "No Sale!" We paid the ten percent commission on a no-sale of $400. She later sold it to a museum for $1,000.
I've seen used TV sets sold for more than a new price! A few years ago, I went to a sale where two used and muddy shovels with broken handles were sold for more than one would pay for new. Go figure!