Stalls showing the # of uses remaining... is possibly a thing to be done someday, though idk if the devs even want that.
Those stalls are player owned, and therefore it is almost as much risk as trading through a barrel.
Next thing is, someone says he bought something in a stall for 10k and thought it must be a really great item because he did not know it and it's that expensive, and it only was some madness item.

Next thing is someone complains about barrels and how they are not safe for trading and wants a safe trading method.
Next thing is someone complains he stepped 3 tiles out of the providence claim and got killed, and wants some sort of safety for that.
Not going to happen.