Could you add an autosell feature? With afk farms, it takes A LOT of time to sell everything, maybe 5-10 minutes of just clicking. Could you add an autosell chest/feature which you can upgrade with different items to make it faster and worth more?
I don’t mean it should be worth more, i think it should start out less than the actual price, and once you upgrade it to the last level, its a 1:1 trade,To be completely honest, I think this is a good thing to test and try out.
I can understand how frustrating it can be having to spend 5-10 minutes selling everything every time your chests are full.
There could be a certain item called "Auto Sell Stick" or something around that, which will like you suggested, sell every item in a chest. Maybe with a certain amount you can use the stick before it breaks and you have to buy a new Stick.
I don't agree with the 'upgrading' part though, resources should keep their value and not be worth more after upgrading.