Is it incorporating insurance too or something? Maybe eBay's discount deal with the shippers expired and they're jacking it up now... dunno.
I actually ran into a little trouble with eBay shipping a few weeks ago - the total in the calculator was what it should have been, around $45 for a decently large piece coast to coast in the US, but when i went to check out, it jacked it up to $70 even though the calculator still was saying 45... talked to sBay support and they confirmed they were seeing the same glitch, and I had to request an invoice from the seller just to be able to pay the correct amount of shipping. Makes it seem a little like something's up with their shipping system, maybe they changed a subsystem part and there's little problems popping up.
Anyways, nice scope.