It's helpful to get this info so thank you both for responding, but just a quick warning to anyone considering buying used: Dust bags are never a sign of when something is authentic or not. In fact, some scammers include authentic dustbags with their fake products. I've also seen authentic items being sold with fake dustbags. These accessories can be easily swapped out - plus, like both of you reported, the designers often switch things up with dustbags in different seasons or even different styles.
