Oh, I gladly undercut people, IF those people are selling things for ridiculous prices.

Like when the new Master recipes dropped, people were selling 1 serving of food for like 12k gil. Like no, I wont let you have that profit. I will undercut you to a more reasonable 3k-5k and flood that MB with the cheap food.
I am a c*nt ? HECK YEAH
When I did not had Gil and did not know how to make Gil in the game and was just leveling, I never could afford decent food from the MB. So if it means that some newb and or hardcore raider gets cheap food on your expanse, I will do it over and over again.