As far as i am aware, the drops are;
Iron, chain, gold and leather armour
Coins
Pointless brick
Potions
Golden apples
Swords
The pointless brick isn't the most common item, but it really isn't as helpful as you may think. Ok, you can smack somebody off a tall building, but scientists have found that 12% of players in assassins have anti-knockback. You should probably work towards getting a bow instead of a pointless brick, because it can not inflict any more damage than a basic punch.