While this has been mentioned here and there in some of the MoP speculation threads, I thought it important enough to call this little niche market out, due to the strong potential for high profits.
BOA gear is nothing new to us and the enchants that are considered best for BOA gear aren't new either. But, what is forgotten is the profit potential when you combine these two things together at the start of a new expansion... especially one with a new race included.
Just about everyone will be rolling a new Panda... even you most likely. Most of these players will want to get the best enchants they can for their Monk's BOA gear, especially the Chestpiece, Cloak and Weapon.
Just to recap, these enchants will include:
[Enchant Chest - Greater Stats]
[Enchant Weapon - Agility]
[Enchant Weapon - Strength] (not as popular, but still good nonetheless)
[Enchant Weapon - Crusader]
[Enchant Weapon - Mighty Intellect]
[Enchant Weapon - Healing Power] (honorable mention)
[Enchant Weapon - Spellpower]
[Enchant Cloak - Stealth]
While there are other enchants that are viable for BOA gear, these are typically the most common and popular.
Again, this isn't new for most people, BUT...
For the MoP expansion and the introduction of Pandas, these enchants are going to most likely see a spike in sales. For this reason, the mats involved in making the enchants will very possibly/likely see a spike in demand and price.
This is where we should put some of our focus NOW, before the expansion comes. If you don't already have some of these mats stockpiled, I would highly recommend that you do:
[Greater Eternal Essence]
[Large Brilliant Shard]
[Essence of Air]
[Essence of Earth] (probably don't need a ton, but some would be good)
[Fel Lotus] (again, don't need a ton, but several stacks at least would be good, especially now while they are cheap)
Another material I would suggest having stocked up to some extent would be [Dream Dust], as that is used to make [Enchant Bracer - Greater Stamina] and [Enchant Boots - Greater Stamina]. These aren't BOA enchants, but they are still fairly popular.
Buying these mats on the AH right now is possible and you are likely to find some good deals here and there, especially for [Large Brilliant Shard]. However, I would suggest utilizing another option for getting your [Illusion Dust] and [Greater Eternal Essence]... crafting & disenchanting the following items:
[Enchanted Thorium Blades]
[Sapphire Pendant of Winter Night]
There are other options as well, but these are typically the best to use. I personally craft and DE the Turbans and Blades most often, as they seem to provide some of the best results.
To get [Large Brilliant Shard], you can either just check the AH for good deals, or another option is to check for level 52 to 58 blue items (rare quality). Often times, this stuff gets dumped on the AH for less than what a shard sells for. And if you have Bountiful Bags perk in your guild, you could get an extra shard out of the disenchant.
For the rest of the mats, just watch the AH. You'll likely find a bunch at a good price to snatch and save up.
Also, it can't hurt to have some of these enchants made up as scrolls ahead of time as well. Don't use up all of your mats, but have a stack or two of each enchant ready to go at least, and then additional mats stocked up to make more as needed.
Speculation... we could see scroll prices increase by 50-200% or more due to the large number of new Pandas that are likely to be played. BOA enchants have always been one of my favorite markets to deal in, and I'm excited to see just how much extra profit will come from this in MoP!
EDIT: Another thing to think about along these lines... one of the biggest sources of [Greater Eternal Essence] is from disenchanting [Enchanted Thorium Blades]. This item is being removed in MoP, which could likely impact the supply of the essences quite a bit. This alone could cause a price increase in both [Lesser Eternal Essence] and [Greater Eternal Essence]. It would probably be a good idea to stock up on essences for this reason as well!