The demand for high end chants has gone up and driven the prices of high end enchanting mats up too (particularly Maelstrom Crystals and Heavenly Shards). Maelstrom Crystals are going for 200-250g or more on many servers now. What many don't know is it's possible to manufacture unlimited Maelstrom Crystals for under 150g each.
To get the best cost per crystal you need an enchanter in a level 24 guild who's exalted with Avenger's of Hyjal. Go to the Firelands vendors, buy cloaks and disenchant them for unlimited Maelstrom Crystals. If you're not exalted you must be at least friendly to buy the cloaks.
Exalted rep with Avenger's of Hyjal gets you a 20% discount on prices with the Firelands vendors
Bountiful Bags (level 23 guild perk) gets you a 20% bonus when disenchanting
Bartering (level 24 guild perk) gets you a 10% discount and stacks with the rep discount
In the best case, assuming you're exalted with Avenger's of Hyjal and in a level 24 guild, your cost per Maelstrom Crystal comes out to about 146g. Shattering crystals will keep your cost on Heavenly Shards to about 73g too. Horde characters of the Goblin race have it even easier, all they need is friendly rep since thier racial gives them a 20% price discount with all vendors (which does NOT stack with rep discounts).
In the worst case, you need to be at least friendly and the cloaks cost 250g each. Guild perks still apply though, you'll get 10% off for Bartering, and 20% more crystals from disenchanting with Bountiful Bags. Bountiful Bags alone brings the price per Crystal down to about 208g and Bartering brings it down a little further to 187.5g per crystal (5 x (250 x 0.9)) / 6 = 187.5. Exalted rep alone without the guild perks will bring the price down to 200g per crystal.