Yes, this actually works and is extremely easy to do. Obviously, this strategy is only really worth it once you have a moderately large amount of money, 50k or so is okay but 200k and over is ideal. The general idea is to merchant feathers. Read on...
Head to the chicken coops at the ranch north-east of Lumbridge castle. Be sure to be carrying around a large amount of money (The more money you carry, the more money you will make).
This is my smithing guide; however, this guide requires some pretty high mining levels, so it's recommended that you read my Runescape Money Making Mining Guide before you read this one.
Make bronze bars from copper and tin ores. Then, sell them to buyers on forums (you don't have to be a member to look for them) for as much as 100 each. If you get bored of making bronze bars, then at level 20 smithing you can make silver bars. They can also sell for high prices on the forums.
Don't have enough money to buy runes? In this guide, you'll learn how to make over 181 million gp by making runes.
This runecrafting guide includes mining rune essence, which I would recommend getting a high level. If you don't have high level mining or can't buy the essence, then read my Runescape Money Making Guide .
Before you start:
Complete the Rune Mysteries quest by first talking to the Duke in the Lumbridge castle. Bring the mysterious object to Sedridor in the WizardTower basement. Then, take it to Aubury in Varrock rune shop. Come back to Sedridor and you've finished the quest.
Need quick, free, legal money? This method has no requirement level, is not a hack or cheat, and takes no money to start.
Looking to make quick money on Runescape cheaply? I have a way that made me 30k in 10 min. You've probably seen scams or hacks on the internet, but those are either risky or don't work. This takes no money or level to start. Here is a legal, cheap way to make money. The only requirment is to have completed the rune mysteries quest.
Make money with coal on Runescape. We will begin with the basics.
You should start by mining a lot of tin/copper. If you would like to bring up your smithing level as well as mining, mine the same amount of tin and copper. When your mining level is around 40 of 45, you can mine coal easily. If you start mining coal at level 30, when you unlock the option of mining coal, you will get barely any coal, because of the higher-level miners.
Now you can mine coal. Go to the Dwarvin mines west of Edgeville, north of Fallador. Here you should go the southeastern most point. You will see some scorpions, and some coal/gold. Mine the coal here and go up the stairs to the east and follow the people/path to get to the bank. When your mining level is 60 or higher, you can go into the mining guild, in the southern most part of the mining guild. Here it is loaded with coal, and 5 mithril rocks.