Trade House Option

[Aihumans]

can someone guide me how to sell pokemon n items at trade house all i see is buy option pokemon/items or is it need certain condition to have sell option im new just started playing

 

[Anomnomonym]

Trade house & Trading

Trading Trading pokemon & items with other players is possible from the moment you start your journey. The following things are important to note however: The general trade rules on the rules page. Trading can only be done with other players on the same map as you. The Level Cap The Region...

forums.pokemonblazeonline.com

Please use this already written guide which fully elaborates all of this in detail.
Here is an example from that guide