eBay

I am trying to start a new listing. In this listing I want to sell the exact same item(s) but in lots with different quantities and pricing. Is there a way to do this with a single listing as to not make multiple listings with the same part ? Example...

How do I bulk edit the additional shipping for more than one of the same item.I have many of my 2000 original listings with shipping that is too high when a customer orders more than one of the same item. I want to change it so shipping is charged fo...