Bones and a few coins. Maybe some element runes.
Buy them on the Grand Exchange. Another option is to kill guards around Varrock - they drop grapes.
Guards, Market, Jail, And Varrok Guards.
The most expensive drop you can get on runescape is the corrupt dragon battleaxe at 3.9m
If your combat level 25+ then I would recommend that u go to varrok and fight guards tht a level 21 and they wil drop 3 grapes every once in a while.
bones
They will attack you, and they can drop loot. see this page: http://www.tip.it/runescape/index.php?rs2monster_id=238
No.
hill giants and hobgoblins drop them sometimes
Right click the rocks and say "drop".
To drop items, you go to your inventory, right click on the item you want to drop, then use the drop command.
It has no use. You can drop it.
check out the link