Well I am like many others I sell and buy skins on gameflip. Well there is this bug making the listing somehow disappear and gone even listing that contain bot trade is gone. So I saw some of my listing disappear and I make the listing not expired for like 30 days but it somehow disappear in like 2-4 days. I am done with the bs contacting support they take forever and sometimes dont cant find your bot trade listing. You maybe asking check your expiring the expiring doesnt even work, Honestly just fix all the listing thing, its broken!
check this topic: Many skins missing