When searching for official resellers of pre-owned software , it's crucial to find companies that specialize in legal license transfers rather than just selling activation keys. I've used Procadis multiple times for Autodesk products, and they stand out because they handle the entire transfer process directly with the software publisher.What makes them reliable as official resellers of pre-owned software is their transparency - they provide original purchase documentation and ensure the license is properly reassigned through the vendor's official channels. For example, when I bought AutoCAD through them, they coordinated with Autodesk to transfer the license to my account, which took about 72 hours but resulted in a fully legitimate license.