Fiery Weapon sells for 25g or less on my server. Small Radiant Shards in the AH go for 9g a piece. Funny huh? I've spammed the trade channel over and over and never sold a Fiery for more than 25g. Not only that, but I usually get some guy saying "25g? You're crazy, that sells for 15g all day." So, how do I handle something like that? I need skillups to level enchanting, but I'd actually lose money on every deal if I had to buy the mats on AH.
I've learned to farm SM Armory. I can collect 3 to 4 shards an hour, by running past all the SM mobs, except the few here and there that I have to kill, or that end up aggroing me. I kill Herod, run back out, reset, go back in and do over and over. It's boring, but in about 3.5 hours I can collect enough shards to do 3 Fiery Weapon enchants. The Essence of Fire isn't that expensive; right now it's only about 1 gold. So, for 3 to 4 hours of work I can get 75g, and 3 skillups.
Unfortunately, Fiery Weapon went from orange to green, which means I won't be getting a skillup every time anymore. If I just wanted to farm gold, I could put my 12 radiants up for about 100 gold, and they'd all sell. I'd make plenty of gold, but wouldn't get any skill upgrade.
I'm now at the level for Icy Chill, but I'll have to find out how to farm for those mats, and find out if that enchant even sells, and if so for how much. I've read a little about it, and it doesn't seem as though people have a very high opinion of Icy Chill. I'm gunning for Crusader, as it seems that that is the big one that sells.