well for 1 the 1 credit per unit undercut is me people buy the lowest on and dont care about if it is 1 credit or 100 credits lower. so by doing just 1 credit keeps the prices as high as posible.
depends on what item some items people want stacks some the buy single. or per set amound needed for crafting 4 of these or 6 of those.
all kinds of people buyers/sellers usualy a lot of brokers the buy low sell high specialy cause the GTN dont take cuts at all.
I'm not argueing your point, if you just want to help people out. But, economically, it's a waste of time if you just do basic math