If you can donate items who has to pay for shipping?
When you list the item you will have a option to select the shipping - free shiping (which mean seller is paying for the shipping ) or you put the price for shipping which mean the buyer will have to pay it.
And a third very interesting option, Check our WP, we have carrier nodes in the network which mean we can have shipping carriers part of the network.
You have very complex schemes and a description in whitepaper. Can you more easily explain this third option for delivery?