why would people vendor that much stuff... :O
well sometimes i forget that i have ore, or someone returns cod's... or whatever it may be, or i wanna get as much gold as possible and liquidate. When you have crafters you can liquidate 80k in a day if you have a lot of "junk" to sell. i have 3 gbanks w/ 6 tabs each. 1 has all of my cash and a lot of my expensive crafting items in it.
another gbank has all of my fish, and bc crafting junk in it, and wotlk blue boe gear in it
another gbank is solely for herbs. this can go from full to empty in an hour. i emptied over 100 pages of my mailbox + gbank to 1 person and i got over 7k gold, gbank was full 2 days later w/ herbs again. So it just depends if you get lucky or if you have constant buyers. i have a lot of ppl that ask me for my herbs and im more than happy to give it to them. i try and stay low on the radar at all times, spam /2 on a level 1 for like "/2 anyone buying bulk herbs (lich,ice,whateverhere), or ne1 buying sar ore 14-15g/stack" ... i spam it every 2 mins or so for 30 mins and sometimes i get a tell, sometimes i dont. hit/miss. sometimes i get 50 tells. best thing to do is always ask reveiling questions such as...
/reply do you want that CoD or now?
/reply i have over 40 stacks, are you looking for a few stacks or a few hundred?

^^use humor so they know ur not chinese
also if they buy over a hundred stacks, or everything that you have, ask them this:
/reply ok i'll cod all that i have, its ~2 tabs of <whatever here> i also have blah, blah blah
or you can also do this
/reply ok i'll cod all that i have, do you want me to cod you more when i get more in? I'll do it at a discounted rate (vs ah prices) if you want.
^^ dont screw these guys over if they yes, these are the ppl that you are looking for!
also when building customers... even if they buy 1-2 stacks, 20, or 100... also tell them:
/reply thanks for buying, you can always in-game mail me if you need more, add me on your bank toon
^^sometimes these guys come back
money is all about customers. Also if they become a "dedicated" buyer, but if they ask how I get all of it everyday I simply reply "I don't reveil my secrets, for a discount like this I prefer questions as those dont be asked =) I'm sure you understand"