I'll start off by saying i've read almost every thread on here and i'm still having troubles.
I have two 80's and have been playing since Sept of 09. My main is a JC/Tailor and my alt is a Miner/Enchanter.
I've tried the whole buy uncut gems, cut and re-sell but on my server this is roughly a 10-15g profit (less on tues). Really worth it? I know most people will just buy the cut get at the higher price than try finding a JC to cut it for them.
I've farmed Titanium/Saronite (transmuted to titanium) for hours on end, seems to make the most gold for me, but a huge time sink.
I used to sell Ebonweave/Moonshroud/Spellweave, but they only go for 100-150g. Maybe a 20-40g profit if I'm buying the eternal's. (Once per 4days though)
I've farmed tons of Cloth, tried selling it straight, in Bolts and Imbued Bolt's. They sell well, but for the time its just not worth it. It might come out to 40g/hr if i'm lucky.
I tried crafting a boatload of chaotic skyflare diamond's, but they don't sell for crap on my server. I also "played" the auction house with them (i think). I bought all the ones on the AH, listed mine at ~100% (listing 3-4 at a time) and they would set there for a day before getting undercut. I might get lucky and sell 1-2. It seemed like by doing this I almost made it worse. They were 66g when i had listed just mine and after the day or two they were down to 35g from people undercutting.
GDKP runs are out on my server (Farstriders, RP server), we're lucky to get a 25man pug together, let alone one that will get past Marrowgar or Faction Champs.
So where am I going wrong? Or am I doing it right, but I just need to do it in greater quantities? I'll try the below post about selling the JC items to vendor, but I know Chalcedony and Bloodstone are the two most expensive green gems on my server. Huge Citrin is cheap and might be a profit.
EDIT: Generally I don't care as long as I have the gold for repairs, but I want to get the crafted pants for my Mage made, and that requires 8 primordial saronite. (They are selling for ~1900g on my server, so i need 15k g.)