Because most for most items the only way to practicaly get them (not fighting dozens of a mob thats probably much higher lv than you ex: a lv 10 going after 2nd tier orcs for scale gear) is by crafting and many guilds ussualy run out of the needed items or simply dont carry them leaveing people to farm those items themselves or buy from ah. Now since crafters are crafters because they are too lazy to farm they will ussualy just buy from ah. so the farmers will jack up the price because the crafters will pay it because they can make a profit even with the prices. a real world example would be the shoe industry, they buy leather for say 3 dollars then the laces for say 1 dollar plus time/labor will come down to about 15 dollars a shoe then they sell the shoes for around 16 -17 dollars to the store and make a profit but if the price of leather went up to say 5 dollars then the price of a shoe would go up to about 20-21 dollars from the distributor (not from the store). so if farmers raise the price of dark steel ore everything darksteel related will go up in price as well. It is simple economics the problem is a our economy is in the hands of people who have no idea how it works but thats just how the world works you try to get as much as you can for as little as possible.

yeah i am very bored

ps about astrals a skilled smn with ramuh can solo this bcnm but at a high risk