Once a good has been sold, manufacturers have no business telling their customers how to use it. This includes selling that good on.  In general we do not accept as moral or socially permissible the idea that the makers of a good can tell their customers where and when they may use that good, who they may give it to, where and when. Car manufacturers do not sell cars on the basis you will only drive to the shops and back, clothes makers do not sell clothes on the basis you will only wear them on Sundays or every full moon. Limiting customer ability to resell items they have paid for in full is irrational and immoral.