Has anyone had a problem registering a Vitamix bought from Ebay? They ask you when it was bought and where it was bought on the form but you don't have that info buying from there. If you mention it was a gift you still don't have that info if you try and fill it in online. I assume they go by the serial # as to how old a machine is. I read that some people bought theirs there and I was wondering how they registered it and how Vitamix feels about machines bought from Ebay.