"Wij hebben informatie over de verkoop van olie en gas."
Translation:We have information about the sale of oil and gas.
de verkoop is used in situations like "the sale of computers has dropped in the last quarter" (the exchange of a commodity for money), while uitverkoop is a period during which a shop sells goods at reduced prices (e.g. new collection is coming in, they have to get rid of the old stuff) "let's go shopping, it's sale!!!"
verkoop (noun) / Verkopen (verb) is the selling of goods or services. uitverkoop (noun) is when you can get a very good deal, just as the english sale. Par example : De kledingwinkel heeft uitverkoop, meer dan vijftig procent korting!