Is a small profit, when selling clothes and cosmetics, by adding a small amount to the original price at which they were purchased from abroad, considered unlawful (haram) or lawful (halal), especially given the effort and costs involved in purchasing and searching for them?

It is not permissible for an agent to purchase an item for his principal for more than its real price, as this is a betrayal of trust. The one who has done this must repent and return the money to its owners, even if indirectly. To achieve profit in the future, the agent can request a fee for the agency or inform the principals about the profit in the sale. Caution must be exercised against selling adornment tools or clothes that expose women's 'awrat (private parts) to those who display themselves immodestly, as this is considered cooperation in sin.