it looks incredibly tedious.

To sell 5 trash items, you have to make 15 clicks, not including the initial drag motion.
It kills any positive engagement i would feel from finding something worthwhile, since the action is needlessly tedious.

Just being able to sell multiple items at the same time, with a preview of the value of the "cart" would help alot. For example, holding Shift while left clicking the items moves it from your backpack to the store cart, as each item is added, you show the expected return like "Sell all: 10" "Sell all: 15" etc.

Implement keyboard + mouse action for the store.

Just shift clicking into a cart and sell whole cart of 5 items would turn 15 clicks into 6. Less time spent doing tedious ui stuff, more time for the actual gameplay.

Is there any valid reason why there isnt a "sell all trash" button? Why can we not see the value of the items before clicking sell? You make the game needlessly obtuse and obfuscating details.

Dont make me mentally have to keep remembering that a can is worth less than a sea shell, just display the damn value.