This seems like A level Economics meh. Should be called college for people in the US. I thought sentry made some nice definitions on the terms , like firms ( players )producing till the rising portion of MC cuts MR because the additional output brings in more revenue than the cost of producing it - assuming a rational firm aims for profit maximization . And the only cost of such production is the time and effort a player puts into farming. Only thing is , many goods produced are joint supplied of another in lunia . Say a person farming for GB9 could luckily get some dimilies on the way.
Anyway, another factor for dimilies to fall in price was because the of kingdom ancient eq ( support )which gives quite a number of dimiles as well as those fishing quest which one changes for beads. These knowledge/informations are perfectly available to all the buyers too.