Cal. Veh. Code § 6104

Notwithstanding any other provision of law, a dealer who purchases a vehicle pursuant to this article has the same rights and remedies against the dealer who conducts the auction sale as if that dealer were an owner and seller of the auctioned vehicle. The purchaser dealer’s rights and remedies are in addition to any right or remedy he or she may have against the seller of a vehicle sold at a wholesale motor vehicle auction. The provisions of this section may not be waived or modified by agreement, or by recharacterization of the transaction.