Hi everyone. From top to bottom, my 24-month foray into NI was full of issues. In order to buy or sell products second hand, you need serial #'s. If you were selling one or two, I'd imagine it might go smooth (though I wouldn't bet on it). But after that, serials "talk" to one another. You need serial X before you can upgrade to Y and then Z. But their system is atrocious. I had a Komplete package which I eventually got transferred, installed, and working (but with some frustrating days waiting for their Customer Service team. And later, when I went to sell the same package, the serials didn't align perfectly on NI's end. And there's the problem. You need customer service at that point to look into it, mess with things manually, etc. And NI is horrid at this. They USED to have a chat function where you could at least speak to someone in real time. Now, they have an email ticket system. You can expect an answer every 24-48 hours, but I got the impression that they were just trying to tick off that they'd replied, not that they'd fixed anything or moved anything forward. It's extremely frustrating. If you are just getting into music production, I would strongly recommend you look for another company to get in bed with. Native Instruments will give you major issues. I wish I had known what I was getting in to.