I John 4:10 Buy Without Money

Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation [payment] for our sins.
On birthdays or other special occasions in the East, some individuals celebrate by giving a gift to express their thankfulness.  The best gift to give is that which quenches the thirst of someone else. 
First, the giver determines how much he will spend and then he approaches a merchant in the marketplace.  He buys as much water, wine or milk the money will provide.  The merchant changes from calling “Come ye, buy and drink” to “Come, buy water, wine or milk without money and without price”. This indicates a person is celebrating a special occasion and the merchant is distributing the gift.  The refreshment has no cost because someone paid the price for it.  The man who bought the drinks stands with the merchant until the lot is handed out (without money and without price). After each person’s container is filled, the individual bows and says to the giver:  “Thank you, sir, for paying the price.”
Spiritually, Jesus Christ quenches our spiritual thirst when He paid the price for our salvation.  Salvation is bought without money and without price.  Jesus Christ paid it all. (I John 4:10)
Light through an Eastern Window by Bishop K. C. Pillai, D.D., American Christian Press, 1986, 5th printing 2007  (p. 17-20)
Old and New Testament Orientalisms Teachings of Bishop K. C. Pillai transcript
Isaiah 55:1 (pages 254-256)