I use a list found on wow-professions.com (that I put in excel) to gather herbs for leveling alchemy. I take my time (multiple weeks) to buy the mats in the AH for cheap then just store them in my guild vault until I am ready.

I just finished collecting enough for 5 toons to level alchemy to max, and I happened to mention that in trade chat and immediately had an offer to buy 1 for 25k gold.

Of course I sold it, as I calculate I maybe spent 3k for it, at most.

I have so much money I probably would rather have the kit for my team, but if they sell for that much and that quickly I may start selling them.

Just a thought for anyone looking for somewhat easy gold.