Here's the bit from the email they sent me today that outlines the basics:
Free selling
Earlier in the year, we removed transaction fees for pre-loved clothing. As of 1 October 2024, we are extending this across categories, with the exception of motors. Here’s what this means for you:
•Transaction fees were paid when your item sells. We are removing these fees, meaning selling is now free. This applies for both new and existing listings.
•Listing fees are paid when you list an item. You will receive 300 free listings a month.
•Optional add-on features, such as international selling and promoting your listing, will be available for an additional cost.