Hi there,
I cannot reproduce this problem in my Avast browser with a "Basic Blocking" setting in the Privacy Guard feature (green padlock in the top right corner of the browser).
If the PG settings in your browser are the same, and if you don't mind losing all your browsing history, could you please try clearing your cache by going to the SPC, clicking on the green lock in the top right corner of your browser, and clicking on the "Launch Cleaner" button in the "Privacy Cleaner" tile?
You'll then be asked to select a time range in the dialogue box, if you're sure when you first visited eBay, select a specific time, otherwise select all time. BE AWARE that you will lose all your browsing history!
Restart your browser.
Try browsing the pages again.
Hope this helps.
Kind regards,
Joseph