The best ways to make money with your runescape accounts involve developing a specific type of skill and using that skill to make or collect items. However, merchanting is one way players can make money without developing their skills.
Merchanting involves buying items at a low price and selling them at a high price. Use the money you made from the initial transaction to reinvest new items to merchant. Some of the easiest items you can merchant are logs, armor, fish and ores.
Spend your time leveling one or two skills instead of spending your time developing all your skills at once. Merchanting is the only way to make a significant amount of money without having a high level RS accounts in a particular skill. Stay patient and wait until you can buy items at an extremely low price. Finding a lower-priced seller might take a little extra time, but it will result in a bigger profit in a long run.
Of course, to enjoy more fun, you can certainly buy runescape accounts with high level.