Maudlin Latool Ja

I only just noticed that this guy whilst he sells a plethora of useful things for blue mages like gear, weapons, accessories, and a few novelty items, also sells materia - however it's materia that blue mages can't yet use! We can only use materia level 6 in our current gear, and since you need to be a blue mage to purchase from this guy it makes no sense that he is selling materia that's useless to us when there's already an abundance of ways to get materia 7 and 8. Can this be looked into please and discussed?