The ruling on selling different goods at one price

Question:
And to a matter of knowing the purchase from the ambiguity that exists among its owners, whether it is the noise or the defects.

Answer:
This is the aim of an ignorant person, who takes something worth ten, meaning something worth a hundred, and sells it for ten, and takes something worth half a jarsh and leaves it for ten, so that this and that are equalized, so that they become equal. So all of it is invalid and not permissible. Goods are to be sold at what they are worth: the high-quality item is sold at a high price, the medium-quality item at a medium price, and the low-quality item at a low price. As for mixing this with that, it involves gharar (excessive uncertainty in a contract), ignorance, and risk. And saying that everything is ten, or that everything is twenty, is not correct, unless everything in the shop is equal, and everything is worth only ten; in that case, there is no objection.