from 80-85 i had 7.6m worth of rune items alone, not to mention all the dboots,legs,mauls,visage ect from slayer drops. 70 -85 I would say I made at least 40m+ from various drops. Since 85 I have had 7 whip drops that's when the money can start rolling in. Its profitable just don't expect much before 85. Especially not at lvl 30.