You can use https://www.terapeak.com but it cost. or If you can get what you need from 60 days of data. Just search Ebay for Completed items. I use "Sold Items"
You might if you would provide a website URL to get further details about your offers, not sure if eBay allows inclusion of URLs though. Sending traffic to a URL where you have a setup a site with Google Analytics code chunk helps to determine how your offers are performing.
I don't know what you really mean by that. Maybe you want to do a market research on your specific product that you would like to sell. Ebay sellers are cruel sometimes.
You could start by explaining properly what you mean. You can do analysis by simply (shock-horror) searching eBay. For example, if you wanted to know the market for riding hats then search that and you can see how many are listed, the prices, which ones are getting bids, etc. If you mean something else, then explain yourself properly.
Hi, If you want to see how the items are selling, I would advise to add them to your following list, then you will receive a notification when the item will end and you will be able to see how many items were sold. Also you will be able to see the day's when the sales were made. Not very specific, but helps to get an idea of how the item is preforming on the platform. Hope it helps,