I’m pretty sure we’ve had similar conversations in the past, but I cannot spend too much time digging them up, so a task for you, if you accept it.
My guess would be yes, although probably most are worth not that much.
I remember Ron Gilbert saying that, at some point in life, he gave up and threw away a truckload promo material for one of the Monkey Island games, IIRC, possibly 2, and boxes probably, too.
Then regretting it after seeing how much those were going for on eBay or something.
Where you are is probably going to play a role, too, for instance the local eBay is but a shadow of eBay.com, Craigslist is useless, and so on. For most things, expensive shipping is going to be a problem.