I'm going to guess you mean better drops...here are the things you might want to try
No.
The most expensive drop you can get on runescape is the corrupt dragon battleaxe at 3.9m
bones
They will attack you, and they can drop loot. see this page: http://www.tip.it/runescape/index.php?rs2monster_id=238
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.
This feature is under "Account Management" on Jagex Runescape Homepage, drop down menu.