Discogs fee changelog
Verified against the official pricing page. Open the Discogs calculator.
Initial verification from https://support.discogs.com/hc/en-us/articles/360007521674-What-Are-The-Fees-For-Selling-On-Discogs: a 9% selling fee on the item price plus shipping, minimum $0.10, capped at $150 per order. No listing fee.