You cannot purchase a new license or serial number from the official LinPlug website as it is inactive.
(just for safety if you need to turn it over). saxlab 2 serial number
Before diving into serial number management, let’s briefly acknowledge why you want this plugin. SaxLab 2 is not a polished, pristine orchestral saxophone. It is a gritty, breathy, character-filled tenor sax designed for jazz, hip-hop, and indie productions. Embertone built it with a focus on playability and "human" imperfections. You cannot purchase a new license or serial