If you're in the United States, those boxes are useless as they need to be activated, and if you're not actively leasing them, no one will activate them. They also belong to a cable company if they're US boxes, and are considered stolen property (no one in the US sells them.) So don't try to sell them (and again, no one would be able to use them anyway.)
You might try seeing if you can return them to the cable company. Just tell them you found them or something, no need to mention names.
If you're in Canada, it's a different story. Those can be sold retail.
Originally Posted by lionyno
If there's a regular hd cable/ with box, why do people get 4 of these?
More than one TV?