Enchanting got some new recipes in 8.2, but outside of that it remains relatively unchanged. We use the same materials after all.
If you are unfamiliar with enchanting as a profession I will quickly run you through the basics. You craft enchants by casting the enchant spell on an enchanting vellum that you can purchase from profession vendors. This lets you sell it on the AH. The customers are always high level characters that want to maximize their characters performance.
In BfA there has typically been a lot of competition and you need to have rank 3 recipes to remain competitive as the reduced material cost is crucial.
You can also shuffle your own materials with the enchanting shuffle which can be profitable.
The new recipes
In 8.2 there are 4 new weapon enchants alongside 4 new ring enchants. The new ring enchants are straight up better versions of the old ones with higher secondary stat bonuses. The weapon enchants are also stronger than the pre 8.2 enchants that were available. This means that players will only care about the new enchants as they are clearly best in slot.
Getting the new recipes
Rank 1 and rank 2 versions of all the new recipes are available from the profession trainer in your factions main Nazjatar hub. You will have to spend some materials crafting them at rank 1 to reach the required skill level for rank 2, which will cost you a bit of gold.
Rank 3 recipes are locked behind either Nazjatar rep or world quests. The weapon enchant rank 3 recipes all come from world quests in Nazjatar, so make sure you always keep an eye out for these. The ring enchant rank 3s are from revered reputaiton with your factions Nazjatar Rep. At this point the majority of your competition will most likely have rank 3 recipes for the ring enchatns, so you definetly need to get it to compete. . Keep an eye out for the world quests and make sure you snag the recipes when they are up.
I generally buy most of my materials as I find the enchanting shuffle to time-consuming. It can be a way to bring down the actual gold cost of your enchants, but consider if it would be better to just do the enchanting shuffle if the profit on enchants is too low, or just craft the enchants based on purchased materials if you have the gold. Opportunity costs should always be considered in this case.
Veiled crystals will typically have to be purchased as the shuffle does not generate enough of these, even with the tool of the trade.
As with any item enhancement you make most of your sales on raid reset nights when people get tons of new gear. Post often and cancel if necessary. I like to keep a decent stack of every enchant on me so I can just run a new post scan. 12 or 24 hours is the preferred auction duration as it will typically sell in the first hour or not sell at all. I expect players will only be buying the new enchants now so stick to these. Generally speaking they are BiS for most specs and will sell better.
Updated TSM settings
You can find my updated full enchanting group in my pastebin. I post all my enchants with the same auction and pricing is purely based on the crafting cost. My goal is always to make a reasonable profit and this setup has worked well for several expansions in a row.