Well i am not bothing to use the art dealer execpt 1 time i lost all products i put up. so i will not waste my items i collected.
A lot of misunderstanding on how the
Antique Dealer works in this post.
You lost nothing, because I am willing to bet that you didn't click on the barter button to start the timer on your sale, and the item went back into your inventory when you left that screen.
Also, it would have been item, not items, since you have to unlock the second slot, which you couldn't have done if you don't even know how to start a barter session.