Q. 1. Can blessed Sacramentals be sold? Of a person has too many blessed rosaries or religious medals, can they be sold to recover their cost?
A. 1. Blessed Sacramentals such as Rosaries, medals, statues, Crucifixes and Scapulars cannot be sold or purchased. If they were not blessed prior to be being offered for sale, then they can be sold.
The reason for this is to avoid the abuse where one may try to sell a Rosary that was blessed by a Pope, claiming such a Rosary has greater supernatural powers. There are those who return home with a number of blessed Rosaries that were purchased while on a pilgrimage to Rome or Lourdes, claiming those Rosaries have greater healing power than locally purchased Rosaries. Such a claim is not truthful.
Trying to sell a blessed Rosary or any other Sacramentals because of the location where it was purchased, with claims of greater supernatural powers is the sin of simony.
On that matter, the Catechism of the Catholic Church states:
# 2118 "God's first commandment condemns the main sins of irreligion: tempting God, in words or deeds, sacrilege, and simony."
# 2139 "Tempting God in words or deeds, sacrilege, and simony are sins of irreligion forbidden by the first commandment."
# 2121 "Simony is defined as the buying or selling of spiritual things. To Simon the magician, who wanted to buy the spiritual power he saw at work in the apostles, St. Peter responded: "Your silver perish with you, because you thought you could obtain God's gift with money!" Peter thus held to the words of Jesus: "You received without pay, give without pay." It is impossible to appropriate to oneself spiritual goods and behave toward them as their owner or master, for they have their source in God. One can receive them only from him, without payment."