Ok what you will need for this is
RFD - Recipe for diseaster
^ start it and unlock chocalate
Ok, now that you have 1k, go into the chest and buy as much as chocalate as possible
Then grind it and sell to GE, now you should have enough money to buy out all the chocalate and grapes and pots of flours
Good
Step 2
Money running
Go to travely and from the load stone go south or down
Talk to a guy with injured soilders around him and buy 20 crates of eye of newts
Then go to the herblore master in travely with a herb symbol over him and buy all the vials of water and eyes of newt
If you want even more profit you can go to the 2nd floor of the light house and buy vials of water then or entrea to buy eyes of newt
Now sell all that and you should have 200k-300k
Go back to travely and buy all unf bolts and arrows heads from the slayer master
Go to the ge and sell that
Now you should have 420k
Go to any other slayer master and repeat this
Now you should have 540kish
With this 540k you can now make some decent profit off of anything else you want
I will be sharing more methods later =D and will be adding pics if its HARD TO UNDER STAND !