How can I return multiple skins to my Steam inventory?

This feature is available on the web only (https://gameflip.com/)

1. Go to Listings/On Sale https://gameflip.com/listings/onsale
2. Select all skins you want to return and click on "Take off Sale"
3. Go to Listings/Draft https://gameflip.com/listings/draft
4. Select the same skins and click on "Return Skins"
5. Now log in to Steam and accept all incoming trades from the Gameflip Bots