Scholomance is by far my favorite spot to farm. The amount of money I can constantly pull in from this zone day by day is unparallel. Your greatest money makers in this zone will be Runecloth and Greater Eternal Essences. Runecloth will usually go anywhere from 2g-4g 50s a stack depending on your server. Greater Eternal Essences average at 7g 50s to 18g depending on your server.
Below is a list of all of the goodies you will find in Scholomance that you can sell on the Auction House.
Runecloth
Major Healing Potion
Major Mana Potion
Greater Eternal Essences
Illusion Dust
Large Brilliant Shards
Bone Fragments
Crypt Fiend Parts
Lifestealing Enchant
Dark Runes
For your farming in Scholomance to be complete you will really need to have enchanting, or a character that you can have disenchant all of the greens that you get. The greens will be your main source of income in Scholomance aside from the obvious 70g a run. An average person can blow through this instance in 15-20min depending on your gear and class. My Pally is in full honor gear and takes roughly 20min a run. You'll get roughly 200g a run making it a grand total of 600g an hour.
Before you disenchant the blues that you get from Scholomance, check the price of Large Brilliant Shards on the Auction House. It's important that you do this because if you can sell a Large Brilliant Shard for 1g, then don't disenchant anything worth more at a vendor then 1g.
Runecloth
Major Healing Potion
Major Mana Potion
Greater Eternal Essences
Illusion Dust
Large Brilliant Shards
Bone Fragments
Crypt Fiend Parts
Lifestealing Enchant
Dark Runes