I installed the EasyList filter set and can't make it fail no matter what I try (may be fact that I'm using FF52 and FF31, that the filter set I downloaded was updated 3/24/19 and may have been fixed, or could be other layers of armor preventing the perfect storm of fail (don't have a virgin test browser instance with Adblock Plus but no other armor set up and not going to go to the effort)
Couple of thoughts.
That Easylist set is a combination of adblocking rules and element hiding rules. The fact that some mentioned that the sold or competed items disappear after they load indicates that an element hiding rule is the culprit. (element hiding rules are the ones with ## in them). Adblocking rules intercept the browser requests for content and blackhole it. Element hiding rules engage after the page is loaded, and just suppress display of specified page elements (like a banner ad DIV element. Except on really fast hardware , that action will result in the "content appeared" and then vanished behavior.
All the stuff in the Easylist ruleset is just normal custom user rules like on the user part of Adblock Plus (maybe the newer version are different but I doubt it). Those rules can be edited, commented out with a ! at the beginning of the rule line, enable/disabled with a checkbox, searched for using CTRL-F, etc.
There is an /ebay_ads/* adblocking rule there, and and /ebayad. ad blocking rule there, and a ##.ebayads element hiding rule there. That element hiding rule might be the culprit.
Somebody seeing the problem needs to get in there and start disabling or commenting out rules and see if one (or more) of them are causing the disappearing solds/completeds. Open the Adblock Preferencees window, switch to the subscriptions tab, click on the Easylist subscription to focus it, click in the lower or right pane where the rules are, type CTRL-F to search, search for eBay, find the target rule, and uncheck the box or type a ! at the beginning of the line to comment the rule out. Then reload the sold page and see. Repeat as needed (re-enable or uncomment rules previously disabled/commented if they are not guilty), until maybe the bad rule is found.
If a bad rule is found, post it here and I'll look at it and see if anything can be seen (as I said, I can't make it fail, but I can look at the sold page structure, and at the rule, maybe deduce what it is trying to do, maybe why it is producing undesired effects, and maybe a revised version of it that works as intended (may be that the rules selectors are too broad and just need to be refined - actually that ##.ebayads element hiding rule is super broad, but shouldn't be affecting sold search results elements unless eBay screwed up and assigned, for example, an ebayads class attribute to a non-ad container on the search result page - or some other wrong attribute. Possible, but I didn't find it.)
There are a ton of google ad related element hiding rules there also, and google ads are the ones that appear on the top of the pages. Pubmatic content on right sidebars possible too.
In summary, I suspect it's possible that it may be an Adblock Plus Easylist ruleset element hiding rule with an overly broad selector, maybe in conjunction with an eBay oops where the coder tossed a class ID that an Easylist rule targets onto a parent container instead of just the child container with the ad, and the actual search result content in a container also under that parent is getting wasted along with the ad container (or something similar).
