You guys ever notice this? In a fixed price listings that's sold hundreds of units, if you click to see their purchase/sales history eBay will show you the sales that listing has made along with price and date.
Generally the list will only show the most recent 100 sales only. But many times I notice the list is inaccurate. I.e. listings that say over 1000 sold will only show less than 100 sales on the sold list. And sometimes you can see a listing will be selling like 30 items a month but will be a gap of a few months in the sales, which I'm sure eBay just "left out".
Here's an example in one of my listings https://www.ebay.com/itm/360486066828
I've sold over 1000, but if you click on the sold history it will only show about 40 sales. And there's a huge gap between oct 2017 and feb 2013. I can assure you I've made many sales during that gap.