The permissibility of buying an item and selling it after taking possession of it and owning it

Question:
We received this question, in which the questioner says: As for a person who buys an item and then sells it to someone he has already known, and in fact is certain, before buying the item, that this person will buy it from him, knowing that there was no prior promise or agreement, but rather, due to his knowledge of the person, he is certain that he will buy it from him.

Answer:
If you buy it, and the purchase is completed through offer and acceptance, and you own the item and take possession of it, it is permissible for you to sell it to this person or to anyone else. You are not bound to a specific person; whoever comes to you wanting to buy it, you sell it to him. Yes.