That's a good idea for an added feature, but that isn't really helpful when it comes to Player Shops. For non-player-owned ships, that's a great feature to have, but for player-owned shops, I don't really like it.
I think I'm leaning towards a put-in-one-buy-one method for player shops. I've been sidetracked by various little mods over the last few days. I'm fighting little bugs in scripts here and there, making new scripts, making new bugs, it's all crazy. I still need to update the method that the script uses to check who's in an area when giving out bonus money to people in the area. I'll need to work on that.
Not to mention that I've been completely slacking on the GUI. I'm seemingly changing my mind on things, and may completely rework it. It'll be some time before this script gets done.
But if I'm lucky, we'll have Area Zones before Elevators, perhaps. >:D