eBay

I have 6 warehouses across the country and my items are available in multiple locations. How do I list the different warehouse locations for the different items so that shipping charges are calculated accordingly ?

How can we find out our market share info on ebay (Qty of my listings / Qty of listings in the same category (or) actual market share by sales numbers. Specifically for auto parts, what is the level of deep dive available for measuring this. What are...