This is why all my stuff has a seperate license. It superseeds the R' license and it specifically permits the end user to sell or give away his copy so long as (s)he does not keep the original. From the Nerd 3D License... You may transfer all your rights to use the Model and Documentation to another person or legal entity provided you transfer this Agreement, the Model and Documentation, including all copies, update and prior versions to such person or entity and that you retain no copies, including copies stored on computer. So, if any of the product are mine... You already had my permission to continue using them.