Sure, but consider the costs of consuming your space with junk. Now you have less room for things you care about, there's a maintenance burden, and there's a mental burden as well
Yes, but were the vacuums actually good? He left 10 reviews for this company, which may have led other people to buy them, and made this company look better than it is... just so he could stuff his shed full of them? That's kinda fucked up. He even said he felt kinda shady about it, so my guess is that the reviews weren't honest.
