One could interpret this Best Buy POP sign in two ways. First, it’s simply a somewhat snarky statement about the demise of Circuit City and how, since Circuit City will no longer exist, there will be no prices to match.
Second, the sign could be a simple admission Best Buy can’t possibly match Circuit City’s liquidation prices because if it did, Best Buy could find itself facing liquidation. Likely it’s the second interpretation and is based purely on the need for Best Buy to meet its own bottom line.