Hm, I don't want bots to have a bigger part of the market than they already do. :/

If I gather mats, I'll just get one full stack. When I go to sell on the mb, I'll post stacks of multiples of 3 or 10 depending on if it's used more for crafting or GC turn ins. I know I tend to avoid buying from folks that put up more than 5 of the same item, so I will only post 2 or 3 of the same item in each city. If it sells quickly, I'll turn around and post another stack in the same city. If not, I won't gather any more of that item. The leftover mats sit in my retainer inventories til they are needed.