"confidence I'm not buying something that won't be repairable"
I think people worry about this too much. Yes, Nikon won't touch a grey market product, but there are Nikon authorized repair stations that will such as APS ( http://www.nikoncamerarepair.com/ ). If you're buying new, that's a different story as you want Nikon's warranty service to be available. With a used piece of equipment, no matter how recent it is, there is no warranty beyond the original purchaser. I've only used Nikon themselves once for a repair (under warranty). I have used APS a number of times with complete satisfaction.