The Software & Information Industry Association has filed eight new lawsuits against eBay-based software sellers, alleging that they are selling counterfeit products.

The lawsuits, announced Thursday, come in addition to nine lawsuits the trade group filed against eBay sellers in February. The SIIA has filed more than 25 lawsuits against eBay sellers in the last two years, and has reached several settlements, said Scott Bain, SIIA's litigation counsel.

The most recent lawsuits were filed in U.S. District Court for the Northern District of California on behalf of Adobe Systems. The lawsuits accuse eBay sellers in Arizona, Texas, Pennsylvania, New Jersey, California, Connecticut and Florida with selling illegal copies of Adobe PhotoShop CS3 and other software.

SIIA officials have said that the trade group has approached eBay about ways to cut down on the sale of counterfeit software, but eBay has rejected the trade group's ideas. The SIIA has asked eBay to end one-day and buy-it-now auctions of software, but eBay has not agreed. EBay has also rejected a SIIA banner advertisement aimed at educating customers, said Keith Kupferschmid, senior vice president of the trade group's antipiracy division.

SIIA has estimated that about 90 percent of software sold on eBay is illegal, Kupferschmid said.

The 17 lawsuits in the last two months repraesent SIIA's "most aggressive campaign yet" to go after online auction sales of counterfeit software, Bain said. "Unsuspecting consumers and legitimate software sellers pay a steep price when software pirates are allowed to operate freely on auction sites," he added.

Two eBay representatives didn't immediately respond to a request for comments.

When SIIA files lawsuits against an eBay seller, it doesn't typically contact the buyers of the software, although the trade group runs a periodic program where customers who have purchased counterfeit software can turn it in for a rebate, Bain said.

Customers using auction sites to buy software should be wary, he advised. "They need to look at the source ... and look at the price," he said. "If you're paying $100 for $700 Adobe PhotoShop software, the odds are not good that you're getting legitimate software."

The IDG News Service is a Network World affiliate.