A short distance northeast of Rockery Haven are smugglers which drop fake documentations. Each documentation is worth 91G, and they drop it almost
every time. 99 of these are worth 9k. This requires about five minutes with a second class character (above level 40).
It is a very easy and fast way to get money.
Easy money trick:
Use the following trick if you are at least level 14 and need some money but cannot fight strong monsters. Go to Argent. Go to the mines directly west of the battlegrounds entrance (you may have to go up a bit). There will be level 12 bear cubs that drop paws and fur that are worth 20 to 30 gold each.