If you want to sell your item via a thread on the forums, take it off the market
C) Do not attempt to sell, or pay with items or Toricredits that are not in the inventory of the account that is posting. No; "It's in a bank account". This also covers the sale of items currently in the market
This will be closed. Once (and if) you decided to remove it from the market, you can open this again. Thank you.