Trading Question: is it a bug?

I've recently tried to trade items you could make with hunting feather wolfs and other animals and noticed that the price were a bit odd when it came to trading.
unlike with other trading items i dont see any price fluctuation on those items and they seems to have their price way under their initial value.
Price fluctuation


their price are 33% of the original item value wich is realy weird. Is this a bug or something that has been removed from GameZ for some reason?
Thanks to those who can answer me on that cause since no one trade i think its unlikely to happen :').