The price seems a bit high to me. Dura Ace is nice, but it's probably two generations old. Based on sold listings on the 'Bay, it looks like a fair market price is probably ~$1,100.
IMO, that's still too high for an older carbon bike. But, prices are likely a bit inflated at the moment.
Technology on the frame is probably fine. One thing to keep in mind is that newer road frames tend to have more clearance for wider tires - like 700x28, sometimes even 32.