Runescape moneymaking?

my best money make was air runes - come them at the alter and you will be rolling int eh money, true like a lot of jobs it cost money to start off as you will only get one rune for 1 rune essence but when you get to level 30 runecraft your soon making 3/4 for each one (thats about 80g for each rune essence you mine) and again higher you level the more you get so all it does it make the cash . also one final note best place to sell is market as many mages go there for speed and convienince