Assuming all is well in the seller's world he/she should not be ignoring your emails. That's just bad form.

But I have had many eBay-related instances like this: tracking number show that a label was printed and the post office is awaiting the item. This is what is listed for days and then the package shows up. When that happens I think it just didn't get scanned upon drop-off and they don't scan it until its delivered?? Give it some more time.