Very complicated. Some other things are just not possible on the app. I don't recommend this as a side gig unless you have access to alot of unique products or you will be competing with multiple sellers to the point you will lose money if you try to match prices. A bunch of my product has gone missing before getting checked in at Amazon. No one will respond. I think they rely on first time sellers trying it for a few months before they realize they are losing money. Ok for mass quantity.