First guide :-) so please no flaming.
Okay i was leveling a BE pally in ghostlands for Tranquillien rep and the two quest "Rotting Hearts" and " Spinal Dust" ask you to gather Rotting Hearts and Spinal Dust. Here is where you can either get 500 rep and some potion for 30ap against undead (Rotting Hearts) or 23 spell damage against undead (spinal dust). The best part about these items is they are NOT BoP meaning you can sell them in the AH. Now, i have not sold these items in the AH yet, but im sure, just like most people who have tons of cash, dont want to spend hours rep farming to get exalted with a faction will buy these from AH.
Run down in shorter less wall of text terms.
Farm Spinal Dust and Rotting Hearts
Sell on AH
Profit.
Rotting Hearts drop from Risen Stalkers and Risen Hungerer
Spinal Dust drop from Dreadbone Sentinel and Deathcage Sorcerer.
Happy Farming