Is it permissible to purchase three plots of land at a reduced price if there are other buyers who would purchase two of them at a higher price?

It is permissible for you to buy three plots of land for 45,000 riyals, then sell two of them for 40,000 and keep the third for yourself. It is stipulated that the purchase must be permissible and free from injustice, and that you do not sell any of them before fully possessing them, based on the saying of the Prophet, peace and blessings be upon him: "Do not sell what you do not possess."