Is it Islamically permissible to take goods from a wholesaler for sale and then pay their price, knowing that the seller takes a 45% profit margin and provides shipping and delivery services?

There is no harm in these merchants marketing the products of this e-commerce website through their own websites and pages, provided the products are permissible. The fact that the website takes 45% of the profit means that the merchants' commission is 55% of the profit. This is a matter over which jurists have differed regarding the determination of the wage. The majority of them stipulate that the wage must be a specified amount, while some scholars have permitted it to be a percentage of the profit. It is permissible to purchase goods from these merchants or agents, provided the agreed-upon price is paid after the sale, as it is not a condition for the validity of a sales contract that the price be handed over at the contracting session.