Return of Reckoning

So I am level 15, and I am making talismans left and right to level up the skill. Do I just sell them to vendors whenever I am myself full up on them? Are the weak & feeble talismans even worth going to the auction house with?

You just need to look them up. Many wont be worth anything.. just give them away, some people don't even have anything slotted in their gear at low levels.

a lot of people try to slot something from 16+ onwards and you can usually get something even for terrible talismans if you take the time to properly list them on the AH. i know every time i'm lvling a character with just SCs i'm spending most of my winnings on pretty bad talis, even +7 - +8s can be another 10 to 15% on a stat

Sell the white talismans to vendor, they are trash, give the green ones to newbies or use for yourself. New players should at least buy green ones for their gear to use bolster but many don't even know it.