The U.S. Court of Appeals for the Eleventh Circuit heard arguments Tuesday leveled by a group of auto-body repair shops claiming State Farm Insurance and a host of other national carriers are conspiring to fix prices.

The plaintiffs say the insurers have conspired to drive down the prices they’re charged for repair services by agreeing among themselves to pay a preset “market rate” and to enforce compliance by “steering” their insureds to businesses that play ball, effectively boycotting other shops.