I just took delivery last week of a 2015 85D and absolutely love it! It only has 15k miles so price was a little higher than similar vehicles. All upgrades except for cold weather (I live in ATL) and 21" wheels which I didn't want. I bought through Tesla so have extra warranty (similar to CPO programs). Near perfect condition.
The prices you mentioned are definitely in the ballpark of what I would expect and do agree, you are looking at the best value for the dollar.