This has been requested several times, please check the existing threads on this topic... Forum search ist your friend...
This is just a random sample of the many hits:
https://forums.ubisoft.com/showthrea...highlight=Sell
https://forums.ubisoft.com/showthrea...highlight=sell
https://forums.ubisoft.com/showthrea...highlight=sell
https://forums.ubisoft.com/showthrea...highlight=Sell