Rebate blues.

In another class action case, Sherman Oaks firm Parisi & Havens LLP filed a complaint against Sirius Satellite Radio Inc. and Best Buy Co. Inc. in Los Angeles Superior Court last week accusing the defendants of deceptive rebate practices.

According to David Parisi, his client purchased a satellite radio and was promised a $50 rebate. The instructions told her to send in a photocopy of the serial number or an original bar code. She was denied for not sending both, he said.

Parisi doesn't know how big this class might be if approved by the court in the next few months.

"Rebates are hard enough to follow as it is, but when the company changes the rules after the fact, they're nearly impossible to obtain," said Parisi, whose firm specializes in class actions. "We like to go after the big guys."

Best Buy and Sirius did not return calls for comment.