NIB means it's never been run or mounted. It should still have the factory plastic bag and packing oil on it. The box may have some wear from sitting for years. But the item inside should still be new as the day it left the factory.

The guy hosed you. File a paypal complaint.

Don't leave feedback for 89 days!!! You have 90 days to leave feedback on ebay. If you leave negative feedback for the guy right now, he is sure to leave a retaliatory negative for you. Best bet is to write it down on the calender and leave the negative comment around midnight or 11:30pm on the last day. That way he can't retaliate. He's got no time unless he camps in front of his computer.