It depends on the server, but on my server the easiest way to make a bit of gold with enchanting is by disenchanting items for their mats, which you're better off selling on the AH again. Nowadays there's too much competition when it comes to selling enchanted scrolls. Even if you can undercut them, it generally takes too long to sell an enchanted scroll. So what I usually do is just to look on the AH for cheap green/rare disenchantable items or look for which enchanting mats have a sweet price tag for the moment and then look for items to disenchant which grant you that specific dust/essence.
It's probably because of the whole 100% drop chance from a bonus roll but Dancing Steel/Jade Spirit prices have plummeted by around 500 gold on my server, so things may not be that rosy on the sha crystal based enchant front right now. Since 5.4 hit, even the low level enchants have taken a hit because of the heirloom deal.
1. Run cata instances, de the stuff you get, sell for gold.
2. Snipe low priced stuff from the AH, de (or buy low priced enchanting mats), use addons to keep track of what enchants that sells for a profit, keep relisting and watch for undercutters
I started selling the rare wep enchants, and its very profitable at least on my realm. Around 1.2k gold each; another way to make money is to transmute all ur mats into sha crystals and just try the ah a lot