You haven't blown your download limit and been shaped onto dial up speeds have you?
That sounds like the page is trying to load and failing. I occasionally get that problem but a refresh will fix it.
Try deleting all cookies etc ... Try a free program called Ccleaner.
Have you tried pinging the isp?
Just wondering how many steps it goes through and where the problem is occurring.
Sometimes websites will change a host which can cause an issue for some people in certain areas.
Does this only happen on the Aus ebay or the US ebay as well?