I could see it going XF-AU, and it appears genuine, but it is very obviously cleaned. I've never bought from Denver Coins Co, but I've seen a bunch of their listings and it seems to be, and I'm certain is, too good to be true. I could be paranoid but I think the first suspicion is that they start at $0.99.... while it can be good to increase popularity with more bids, they are also taking a HUGE risk on something like a 16-D, as even in P-1 it is still a good $500 coin. $2475 is not that bad of a price for that coin, but it still has 5 days to go and will likely become an element of unobtanium by the end.