Avoid: a scammers paradise.
I decided to sell my old collection of CDs and set myself up as a seller on Discog. As a test I offered my first disc and found myself on the end of a most sophisticated extended scam. The 'buyer' tried to direct me to a phony Discog site where I had to prove my credentials as a seller by entering card details. What is more worrying is that Disogs appear to be not concerned in the slightest. They do not respond to direct mails relying on bots.