Just because an item has a smoke odor to it doesn't mean you can't sell it or that the product is worthless. Especially with electronics.
One way to remove the smoke odor from your products is to put them in a plastic bag and vacuum as much of the air out of it as possible.
Typically 48-72 hours in this sealed environment will be best
The lack of oxygen typically kills the odor of smoke on products, especially plastics like electronics.