I mend, sell and buy gas lighters

A: It is not permissible for a Muslim to sell things that are prohibited, as it is considered as cooperating in sin, for Allah (Glorified and Exalted be He) says (what means): (Part No. 13; Page No. 108)  ...but do not help one another in sin and transgression. Also, because the Prophet (peace be upon him) said, “When Allah forbids a thing, He also forbids its price.” May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.