As is often the case, the answer is "it depends". As a general rule copyright gives the owner a bundle of exclusive rights, *e.g.*, the right of reproduction of the work, preparation of derivative works based upon the work, distribution rights, performance rights, public display rights, digital audio transmission rights, etc., depending on the type of work that is subject to the copyright. So, without more facts about your circumstances, it is unclear whether your use of the copyrighted work would fall into one of these bundles of rights (prohibition) or if your work is so substantially changed in purpose and form as to fall outside of the original copyright protections (where you should be free to sell at your discretion). More information about your particular facts is needed to properly advise you. Consult an intellectual property attorney with more of your specific facts for a better answer.
Answered on Oct 23rd, 2012 at 2:43 PM