An idea I came across today was when I was selling some stuff on my main account and realized it is quite annoying to click on every single item to show someone what I'm selling. An idea I would like to see is a button during the 1st inventory screen being able to put up all your items into the trade screen instead of clicking all of the items. This can be beneficial in high risk pking when showing your inventory set up to your opponent or simply selling a full inventory of stuff to someone. Nonetheless I think it would be a unique feature to be added in future updates.