The best way to OSRS Gold For Sale is to earn money by playing the game. There are many excellent methods for F2P and P2P money-making on YouTube as well as at the Runescape Wiki.
Personally, I recently crossed 10 million. My favorite ways to count include:
Cutting and selling yew wood 60 wood cutting (though this method isn't as efficient as it was in the past).
Mining Iron -- Very low-level requirement, and quite quick, too. It's also the most efficient method of training mining in F2P.
Smithing/Superheating runite bars -- This requires very high stats, but is the best method in F2P
High Level Alchemy Visit the wiki page on the High Level alchemy market to see the top items.
Fletching arrows without heads It's quick and easy, with there are no requirements for stats. You just need to purchase arrowshafts, feathers and arrows then fletch them and sell them back to make an incredible profit.
All of these are F2P. There are additional methods listed on the Wiki as well as many more are available to you when you're an active member buy old school rs gold. Enjoy making money safe!