Vortex Sound Research

Has anyone here sold used software on GearSpace? My listing got taken down on Reverb (I have sold a lot of stuff there, so it was my first choice, but apparently they don’t allow used software sales), and eBay fees are confusing and expensive. I’m worried about selling on GearSpace because I’ve never sold something through a forum. How does that work? Does the buyer pay me first? How do I prevent being scammed?

EDIT: typos