I am running into an issue, I noticed my app was not displaying information regarding the "Finding API" more specifically the "FindCompletedItems" call. I get no errors from eBay, it just returns "0" items. It doesn't happen 100% of the time, but it does happen for about 80% of the requests that I make. I tested it directly in the eBay API explorer, for example. The API explorer's example for "iPhone" only returns "2" items. (That's bonkers! Only 2 iPhones have sold on eBay?) When I type some other popular items like LG G3, LG G3 Phone, iPod Touch, iPod Touch Home Button, etc., I get "0" Items returned. I also found that I get the same results under the "FindItemsByKeyword". I believe the API is broken. Am I missing something? Is there a new API I should be using? I am desperate to get this resolved. Please help if you can.
It sounds like you are using the Sandbox. Be sure you're using Production, whether in the API Explorer, or in your API calls. I've seen findCompletedItems return occasional false empty results sets (in Production), but it's infrequent and I can re-call for proper results.