When a retailer puts up such a bat, even though the bat brand decided on the grading/price and not the retailer, a user could get the impression (irrespective of right or wrong) that the store has bats that aren't of value which could affect traffic in other ways. When competing in a tough market against other retailers who market hand picking/showcasing few bats with mis-grading the other way (G1/G2 looking at G3 price) etc., one might want to avoid such a situation IMO.