'Buy' in the Bible

I thought to disclose it to you, saying, 'Buy it before those who sit here, and before the elders of my people.' If you will redeem it, redeem it; but if you will not redeem it, then tell me, that I may know. For there is no one to redeem it besides you; and I am after you." He said, "I will redeem it."

Then Boaz said, "On the day you buy the field from the hand of Naomi, you must buy it also from Ruth the Moabitess, the wife of the dead, to raise up the name of the dead on his inheritance."

So the near kinsman said to Boaz, "Buy it for yourself." He took off his shoe.