I've been trying to make gold off Cata greens because people swear it works with time. I haven't had a ton of luck so far, but I get so much that I'll keep at it for a while since it's decent Embersilk.
I'm not even sure WHY these greens are supposed to sell so much. People I talked to said it 's mostly people leveling who want better gear, but I'm kind of like, 'I'm not exactly having issues leveling with greens form Outlands while in Pandaria' due to Heirlooms carrying my dps. And I'd say it's for DEers, but TUJ lists these items at like anywhere from 100-3000 gold, which I have a hard time buying. It's clearly not transmoggers either. Do people twink at 75+ish? Is that the hot bracket?
I've been preaching about the selling of greens on AH in this thread quite a bit, so I thought i'd elaborate a bit.
The reason it sells:
- People are lazy
- Everyone doesn't have heirlooms
- People do PVP
- People do transmog
Go clear all the old raids, anything so you aren't posting the same greens on the AH from Cataclysm.
The trick is pretty much having a wide variety of greens, and having a lot of them. I have around 550 on AH right now, and while I only sell a very small part of them pr. day (5-10%) it's always different ones selling, and it might take a while for that Spirit/Stamina sword to sell for 150g, but 9 times out of 10, it'll sell. (If you follow TUJ prices)
For your last question, I don't know if it's that common, but a couple of friends and I 'Twinked' our way to 90. Only levelling in BG's and buying the best gear available at each level. Insanely expensive, and incredibly fun.
Anywho, if you're only gonna farm Embersilk, you're probably better off picking out the good ones you want to sell, as you'll quickly hit a point where only 1-2% of your greens sell.