Can Clozen use my pictures?

By putting information or data on Clozen, in particular pictures, i.e. "content", the users of the website or services hereby grant by the Terms and Conditions to Clozen, without compensation, a non-exclusive license to use the content throughout the world. This license includes the right to use, copy, reproduce, display and adapt the content. Clozen may use the said content in any medium known or unknown to date and in particular on television, in newspapers, on the Internet (in banners and articles, on other websites) and on social networks (Facebook, Twitter, Instagram, Pinterest, YouTube, Tik Tok, etc.), and this for operational, commercial, advertising and internal purposes of Clozen, which all users accept. Users are exclusively responsible for the content and confirm that they hold all rights to this content. 

Are other members allowed to use your pictures to sell an item they have already purchased from you?

It is recommended that you take your own pictures and use those. However, there is nothing to stop a buyer from asking the seller for permission to use his or her pictures!