weapon Spellpower or healing power (the MC ones)
weapon +15 agi +25 agi
+18 sta to shield

are some that come to mind ...usually used on heirlooms
and well the shield by tanks leveling by dungeons

fiery is a great way to get some profit, wouldnt call it horribly exotic though. It takes about 5-10 quick BRD runs to get the drop (And I think its not even BoP)

I find the +30 spellpower enchant to be well worth the time I spent getting it. It's the strongest enchant that can go on a BoA caster weapon. There's an equivalent for DPS I know, but I can't remember it off the top of my head.

@elstor No, it's not BoP, and no, you don't even have to do 5-10 runs, it's dropped for me every single time i've run BRD, i think they changed the droprate. The pattern still sells for like, 100g on my server, though.

You might be thinking of cruzader or lifestealing

Best enchants to get

Heirloom Weapon:
+22 Intellect, Revered with Thorium Brotherhood
+29 & +30 Spellpower, Molten Core
+15 Agility, Honored with Timbermaw Hold
+25 Agility, 2 Hand, Friendly with Timbermaw hold
Crusader, Scarlets
Firey Weapon, BRD
Icy Chill, Highbourne in Winterspring
Unholy Weapon, Stratholme
Lifestealing, Scholomance

Rarer, but still useful:
Mongoose, SoulFrost & Sunfire, Karazhan
Executioner, Zul'Aman
Cat's Swiftness (Agility & Speed to boots), Kael'thas

Heirloom Chest:
+3 Stats, Trained
+4 Stats, Outlands drop

Part of what I like about selling in trade channel is when a new enchant comes out I can sell them for pretty insanely high.

For like the first 2-3 weeks after Ulduar came out, I was selling Blade Ward for 500-1500g each, WITH YOUR MATS.

Even for months afterwards, I was still generally able to sell it for about 150-250g each. I probably made at least 50,000g off of Blade Ward alone. And another 15,000g off of Blood Draining.

I may be underestimating Vellums, but I don't think I would have been able to make that much money selling them on the AH. The only place I put them on the AH was the neutral one. The enchant wasn't dropping on Alliance side, so I was able to sell them for like 5000-6000g on the neutral auction house to like 3 different Alliance raiders who asked for it on the realm forum.

Vogie has it spot on correct. Lets hope no-one on my server read this, took me a while to collect 'em;)

The only hard ones to get from that list, if you don't mind a bit of rep grinding, are +30 SP (aaagh, MC runs...) and anything useful, BoP and *sellable* from BC drops, which is much just cats swiftness & +4 stats. Mongoose recipe is 100% drop from Moroes now, and you can 2-man him, or solo if right class.

Of course the real trick is getting hold of a regular supply of the required mats when no-one really does the necessary content any more...

i got every exotic/old world enchant on my chanter and i sell a bunch every week, scrolls of 15 agi are easy to farm and sell for 100-250 gold depending if anyone else is selling