Hello. This is a little guide I used to level my enchanting to 475 to be able to disenchant all cataclysm green quest rewards.
As you all may know cataclysm dropped the prices of WotLK enchanting materials and made the cataclysm enchanting mats incredibly expensive now when everyone wants to level it. Well my solution to this was to level with the following enchant:
Enchant Bracers - Major Stamina
Enchant Bracers - Major Stamina - Spell - World of Warcraft
This can be bought for 5 Abyss Crystals from Dalaran Shard Trader.
MATS: 1 Abyss Crystal - Item - World of Warcraft and 4 Greater Cosmic Essence - Item - World of Warcraft
This enchant is extemely useful for its cheapness and the fact that from 450-460 it's orange and from 460 it's yellow.
On my server one Abyss Crystal is selling for ~10g and Greater Cosmic Essences are selling for ~10g each.
This makes the total cost of this enchant apporximately 50g PER SKILLUP!
This is a huge saveup compared to the cataclysm enchants which can cost up to 200g per skillup!
I suggest you try it out if you're leveling enchanting. I can't guarantee the prices will be the same on full populated servers or extremely low populated servers. I myself am playing on medium populated server.