Can you name a product that is un-marketable? Why do you think it's un-marketable?

however every has been attracted resources and produced under a pland program is a product, either it has good market or not. In fact, the main problem is in marketing(business  case) as well as maybe in advertising and weak activities on introducing the produced producd to customers.

Yes , Medical Drugs

Reason : Specialist has to prescribe for the relevant individuals .

I have seen sand sold to UAE citizens. " Mountain Air in a can" to tourists. and Water to people near pristine lakes....

The only thing you can sell are those things you shouldn't sell. and that becomes a moral question not a marketing problem.

I think that everything can be marketable.