'Buy' in the Bible

And Araunah said, Why is my lord the king come to his servant? And David said, To buy the threshing-floor of thee, to build an altar to Jehovah, that the plague may be stayed from the people.

And the king said to Araunah, No; but I will in any case buy them of thee at a price: neither will I offer up to Jehovah my God burnt-offerings without cost. And David bought the threshing-floor and the oxen for fifty shekels of silver.