Now that greens and blues are from virtually any quest you complete 1 to 60 nowadays (Back in Wotlk ish, not so much.. Decking yourself out with AH greens "Of the Eagle" oh the memories c I would suggest linking it in trade with "WTS for Mog pst" c:
Step one make a female toon and have a buddy link it to you in whatever way (unless you are female then skip this part)
Does the green make you look like a slut
Yes-IT WILL SELL
No-It probably wont
If you have an addon that you can use to display realm value, region value, I use TSM for AH operation then you can check those values. If its a high region value it might be something people want. I wouldnt go after realm value cause might have a nutter on your realm posting every green on the AH at high price.
But mysterymask is right. The greens that sell most are those that look good on female chars. So must make a lvl one and move it to town. Mail all greens to it. Once a while log on it and sort your greens from the mailbox. HF.