In the iPod-dominated market, hundreds of companies have been inspired to develop more than 500 accessories-everything from rechargers for the car to .... Fendi bgs. Eric Tong, vice president at Belkin , a cable and peripheral manufacturer, belives that 75 percent of all iPod owners purchase at east one accessory-meaning that 30 million accessories have been sold . With most of the products priced between ... and ... that puts the iPod economy well over ... million and perhaps as high as ... billion . Popular iPod accessories include: