Some marketing may include brochures or flyers for an auction but on the big sales auctions need to be advertised in a way that everyone knows about it. This means TV or radio or both.
They both get pretty pricey but not so that no one can afford it. If an auctioneer has a really big sale he/she needs to do proper advertising. When an auctioneer lists his/her advertisment, they need to target their maket by age, income, location, and industry. There are four types of marketing; they are newspaper, television, radio,and direct mail. Any of these marketing types are good just depending on the amount of marketing capital and auctioneer has available.
Some of the sites below are auction sites as examples.

Auction Marketing Group.

Express Auctions.

Marshall Auctions.

CWS Marketing.

Internet Auction List.