Some 450 items featuring the autographs of Korean Wave stars have appeared on eBay, the world's largest online marketplace, over the last month, eBay Korea announced on Tuesday. This marks a 40 percent increase from the previous month, it added.

An item bearing Psy's autograph was auctioned for the highest price of US$400 after the rapper became a global star when his song "Gangnam Style" went viral.