Is it permissible to save the price of an expensive garment for an orphan and take the garment in lieu of the money?

It is permissible for a guardian to sell a minor's clothes if it is in the minor's interest, such as fearing their spoilage or their low value. However, if the questioner is a guardian of the minor, she is not allowed to purchase from his inheritance according to the Shafi'i school and one of the two narrations from the Hanbali school. It is disliked by the Maliki school, and permissible by the Hanafi school if there is clear benefit for the ward. In summary: there is no harm in the questioner purchasing the clothes if it is for more than the market price, and if selling them is in the best interest of the minor.