When buying/selling materials, the price must be in the purchase price range to OSRS gold that of the Grand Exchange. However, a company has the choice to how much of a product a individual can purchase. By way of instance, a mining cimpany can sell 100 adamant ores in 110k. There is no arbitrary collection of a product a person can buy. In this manner, the company controls how much they produce.
That is it. I may be adding pictures soon, but please tell me what you believe. I know this is similiar to the Grand Excahnge, but it gives individuals an opportunity to generate expertise, in addition to some cash. I really do beleive RWT is covered also.
Begin the quest by talking to the Zamorak Monk, Priest, or Druid (all will be NPC's placed in the church in varrock) The Quest is the exact same no matter which pirest you talk to, but the rewards will be different. Whichever priest you choose, they'll tell you Father Uhrney in the restless ghost pursuit has found a particular"bundle" and they need you to pick it up. Upon entering father uhrney's house, you fill find he is now where available!
You will have to go to the church in lumbridge and cheap RuneScape Mobile gold ask the priest where father uhrney is, and he'll tell you he went missing. However, he will also tell you the ghost next door was there. Equipping your amulet of ghost talk, visit the ghost and ask him whether he has seen father uhrney.