The idea is just dumb , gtl being the open market they are giving us restrictions they want everything to be controlled. First the vanity grading ( golden-S rank items, red or blue something -A rank items) because of that the prices of vanity sky rocketed. Now the yellow and red price of items. If i am not wrong the yellow color price shows the item is in OK range to sell where the red price shows the item is overpriced, this kills the idea of open market.
If the new gtl system is for the people who buy or sell items for low and high price by mistake they are just dumb and careless i am one of them and fell frustrated but moved on.