There are lots of ways to make gold in RuneScape, from growing herbs to making nature runes. You should keep in mind that the economy of RuneScape is constantly changing.
After you have collected at least 500 go to world one, sell them to the East of the West Bank in Varrock if you are a non-member. They sell for 10-20 gold each in member worlds. Now you can head to world one and sell them in Varrock. It is a great profit for this action with your cheap runescape accounts. You can also buy feathers from fishing shops in big enough quantities to make a good profit. Begin to buy stuff that is selling lower than its market price, and also need to find a buyer that is willing to pay your stuff in high price. Rock Crabs are only level 13 and are super easy to kill, and they drop unidentified herbs and level one clue.
Making gold or money in runescape can be a long and tough process. Runescape gold making is something which requires energy, time, even money to start with. No matter how fast and effective one method may be, it still takes patience to earn money. To save time, remember that farmer100 has awesome runescape accounts for sale on farmer100.