trade QoL idea?

Hello, not sure if others would agree with me, but i think having the option to reduce the price of ALL items in the tab by x% would be a good idea. Sometimes when our items are sitting in the tab for a longer period of time and not getting sold it's kinda annoying to manually reduce every item. It would be a small box where you just type a desired number to discount everything. If somebody from GGG could see this post, that's cool, maybe i'd even get an answer on why is that a good/bad idea. If not that's also fine, we would at least get a nice discussing topic