$770 for the bike new @ MSRP. Subtract 20% if bought late in the model year. MAP pricing about $700, which is what my LBS sells at. The Flight Deck is ok but not worth a huge premium as there are other, nicer computers out there. Even so they're only $50 or so these days. So, that said, not much of a deduct for a 2 year old bike based on his asking price.
IMHO it's overpriced. Should be $400-$450 tops. That said, it's prime season for selling a bike, so there will be a premium as a result.