The cameras which come with cell phones may be used for permissible purposes, or they may be used for haraam purposes. In such cases, the principles are as follows:
1- There is nothing wrong with selling it to someone whom it is known or thought most likely that he will use it for permissible purposes.
2- It is not permissible to sell it to someone who it is known or thought most likely that he will use it for haraam purposes.
3- If it is not known, then one must decide based on what usually happens. If most people in the country use it for permissble purposes, then it is permissible to sell it, otherwise it is not.
This applies to selling the phone itself, and also to selling televisions, video equipment, makeup, women’s clothes, and other things that may be used for good or evil purposes.
And Allaah knows best.