Who would/should get busted Illegal sales?

Question

If the authorities found both the source of the illegal-items [seller] and the buyer, who would/should get more punishment? [Buyer/Seller]

Answer 1

Depends on what is being sold. If it's illegal drugs then the seller should get into more trouble and generally does. If it's stolen property and both parties know the goods are stolen they BOTH should get punished equally.  

Answer 2

  Yes Yes Yes. This USA.

Answer 3

Where is the sale taking place, what's being sold, etc, we need more info. I think the argument your making is similar to drug and prostitution stings. Some say if there weren't buyers the sellers couldn't sell what they sell, I don't agree with that. Sellers should get in more trouble.