Just a data point: I got an estimate for an alignment that I recently had done at a chain for $85 and they gave an estimate of $120 to $153. What keeps the rep

Just a data point: I got an estimate for an alignment that I recently had done at a chain for $85 and they gave an estimate of $120 to $153. What keeps the repair shops that they surveyed from giving them a higher price quote in an effort to skew their estimates?