$650 will get you $65 ebay bucks if you received the10% offer.
Apple iPad Pro 12.9" Retina Display 128GB Wifi + Cellular - 2015
Model: iPad Pro 12.9", 1st Gen, 2015
Colors: Gold, Silver, Space Gray
This device comes with a 1 year warranty directly from Apple.
For service, you can take to any Apple store or call Apple directly.
Current gen refurbs wifi are around the same price. I'd rather get a new one.
Can compare different generations here: