Not an IT person so shooting from the hip spit balling some ideas.
The only time I see the kid in the parka is if eBay removed or cannot find a listing. Generally the latter is because the item number is over 90 days old and has been removed.
"Every 6 hours and refresh link every 3 months"
Are you saying you clear your browsing/cache history every 6 hours and delete and re load the link to eBay page every 3 months? Don't know, but maybe that is too often?
Guess I have been lucky, the only time I clear browsing/cache is if eBay (seems to be only one) scrambles the loaded page and have not had to delete and reload eBay in quite a while, the last time reloaded was when I upgraded to Windows 10.
What about disk defrag or clean up? Could it be that the memory is full or close to and is slowing down the system and because of that is timing out loading/finding the page? Should not need too but would not hurt to check.
Not an IT person, but are you using Windows 10 or 11 or an older operating system? Maybe there is a clue there that someone can help with. Apple, have no clue.
Hope you get it sorted out.
