Someone will buy it on EBAY or at the garage sale this weekend.
Sucks to be them.
Not only would I not buy a second hand helmet, but I'd probably buy a new helmet every few years. A small drop can cause micro-fractures that can develop further over time - requires expensive testing to confirm the fracture, as you can't see it with your eyes. Much safer to just buy new as it's the main defence from certain head-related death.
Not to sound harsh but I'm not really sure of the point of second hand motorbike clothes in general - I'd have concerns about hygiene issues as they are fairly personal gear (being attached to the rider and not the bike on each trip - through heavy sweat and rain). Maybe if it's from a partner or family or something I'd be fine with it, but wearing a random person's smelly gloves or boots ...