I thought about this often: when buying from a vendor I sometimes accidentally click 'max' and from zeeberk's beer thread on the main forum I gather I am not the only one who has done this. Sometimes I want to buy 80 potatoes, because there are 80 in a slot. That means I have to click 80 times. Wouldn't it be much easier to set 'max' to the maximum number of that item that fit into one slot instead of 999? So if I click 'max' I buy 80 potatoes not 999.