Big retailers like Guitar Center and Sweetwater have secondhand sections on their sites, and in general I think people just expect to be able to buy or sell their gear secondhand for whatever reason (musicians often having cashflow problems seems like it might be a factor), and this attitude extended to software as well.
Whatever the cause it is very much a part of the music software landscape, with big players like Ableton and FabFilter and iLok having automated processes in place to support it.
KVR has a bustling forum for it, Knobcloud is also great, vi-control and Gearspace also have forums. Those are the main ones, though you can find it anywhere people talk.Can I ask, when you re-sell licenses, is there a website that typically occurs on?
