As mentioned, it's 4% + 8%.
Discogs is a great place to sell. Their fee's have creeped up in years, but it's still a better and more chill place to sell than eBay if you're patient.
They have the more the advanced user base (both seller and buyer) that know what they are looking for and wiling to pay for it.
The biggest weakness is you can't post pictures with the listing, so sometimes the buyer will contact you directly and ask for pictures outside of the platform.