Great Guide creadited to drifterxion from Official Forum
Ten rules to make your money problems a little lighter

Rule one.This rule is a touchy subject though important. Do not buy from player shops without thinking. Around 65% of players tend to overprice. If you insist on buying from a player shop at the very least check around for other prices both in other player shops and in the game shops.

Rule two. Sell only Weapons gained through rewards (aka killing and getting a weapon as a dropped item) unless your close to your goal

Rule Three Sell Rewarded weapons UNLESS they are your particular weapons just strong (aka higher level) hold onto them it saves the expense of buying new ones which get insanely expensive the higher levels you go. Also buy every other weapon avalible. Not every one. Cuts down on money. Its not hard to fight with a weapon a few levels below you. Better save9 dragons for the next increase in major difficulty.

Rule Four Save beast drops (aka furs skins etc) for clan donations More bang for your buck that way.

Rule FiveDo not Buy Clothes from INgame shops. They offer no change in your stats other then pockets which you can get fairly easily with quest items. Its a drain on your wallet

Rule Six Make Frenquent money runs. Find a place that the monsters drop good loot and are within your level range so you will get skill gains and possible rewarded weapons to bolster your wallet

Rule Seven Dont always jump at the chance to do Chi breathing as soon as it becomes avalible. Use that stall in growth to take advantadge by pounding away at monsters for rewarded weapons whil massively boosting your skills.

Rule Eight Know the Area. Know which mobs are good for exp and which good for loot/rewarded weapons. Know your access points for resting and for pete sakes dont clog up the same areas where every one levels. Find secluded areas that offer the same mobs. They respawn faster AND you dont have to fight/steal other people's items/kills it makes it an easier place for us all. Not to mention slowing down lag in hot spots

Rule Nine Be nice. Some people give items they are done with to lower level players. If your a jerk no one wants to be in the vicintiy or even on the same server with you. That opportunity for a free weapon or accessory is wasted because you just had to make a joke about their momma. Joke's on you moron.