usab = user shop auto buyer thus, you input only 1 item and it search for it. I'm not aware that there's a multi item USAB on this forum. And FYI: the best time to use this is when an item is release (mass event, tarla, ect) Peoples tend to put them in there shop for quite a low price. I bought around 120 christmas PB last year at 1 np each during the give away...