gazumping (السَّوْمُ عَلَى سَوْمِ الْغَيْرِ)
الفقه
التعريف :
That two parties make a bargain, with the seller setting a price and the buyer agrees to pay it. Then a third person intervenes buying the same article at a higher price, or for the same price but manages to get it because he has greater influence in society.