I'm not quite sure the is a "quick" way to drop anything on runescape besides having a fast finger lol. But when banking there is a quick empty button located in the bottom left of the the bank.
The most expensive drop you can get on runescape is the corrupt dragon battleaxe at 3.9m
Buy it from the Grand Exchange - offer maximum to get it quickly. Or kill imps until they drop one - this can take quite 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
If he does not drop it then you obviously did somethign wrong.
I am not a big fan of drop parties.