As noted in this thread:
viewtopic.php?f=48&t=61897
That it would be nice to map multiple hands from barter stand to different containers so you can sell and buy from multiple containers from the same slot. The market right now allows for high value and quality trading but often time hermits and a lot of players play by selling and trading in bulk. So far the only solution to this is to build a ridiculous amount of barterstands to buy bulk and in many cases leaving the majority of hermits and smaller groups out of the market game simply because they must sell quality even though some things can be sold as quantity or resort to discord or other means which seem unnatural to the environment of the game for trading.
Allowing multiple hands from containers can allow for bulk trading from a single barterstand which in return will give hermits and other groups ability to use a single stall and house at for instance CF to sell their bulls and wares and thus allow a better market for this kind of trading and maybe even allow more players to be active since there is note of a market for them.
Even if you dont see it this way, this would be highly useful in any bulk trade or allowing a more extensive use of a single barter stand which makes a bit more sense to sell an item type from one stand rather than twenty different ones. You don’t buy 400 bricks from 40 different stands in real life, you go to a stand and order 400.
If you want a real example of this being currently done, CF buys iron in bulk from hermits since it easily obtainable for them and useful for CF. Often times they have to go between a lot of stands to attempt to sell and then stands fill up quickly because we can only build so many stands within an area. So it often leaves a lot of people unable to sell their iron and so they don’t get quills to trade with. Which ends up helping no one.