Don't know if this has been posted anywhere before, and I apologize if it has.
I NPC almost everything that drops off mobs. Not a big fan of wasting other people's time bazaaring crap.
While selling items to an npc, if you ALWAYS sell from the absolute bottom of the list, it is 3x faster. Tested over 20 times, works every time. Just make sure you offload any items you want to keep to your retainer before you start NPCing your leftover loot crap.