Where to sell / offload licences

I’m looking to offload some of my licenses that aren’t currently getting used, does anyone know any companies or individuals that buy licences in?

I’m looking to get rid of

Cubase Elements 10
Wavelab Elements 10.5
Cubase Artist 10.5
Groove Agent 5
Alto Glockenspiel

Really appreciate it if anyone could point me in the right direction?