*eBay moves into Radio Ad Auctions.

eBay has now started auctioning unsold advertising airtime. In partnership eBay Bid4Spots, it has over 2,300 radio stations across the U.S.

They work as a reverse auction: customers announce how much they are prepared to pay of the spots and radio stations with unsold airtime can bid for their business.

Auctions on a website called eBay Media Marketplace.