If I open item in community market ja press BUY, it will open purchasing window for currently opened item, as expected.

But, if I press SELL, it will open my inventory and I need to find the item again. Instead it should open a window for sale listing for that current item.

This could be implemented by checking does the user have the item after SELL is pressed and then, if match, show immediately the sale listing. And if no match, then show the whole inventory.