There are three Piedmont models available at the Parkwoods listed from $499,000 to $479,950, but none of them are on the 3rd floor.
There is a Carmel model that just came on the market 9 days ago. It's a bit smaller by 124 sf, but it's on the 3rd floor in one of the rear buildings. The listing price is $499,900.
It would not be unreasonable to offer less than the asking for any of these units since the average days on the market for these units is 98 days. I'd make the offer for what you feel is appropriate and if the seller is truly motivated, then they'll be willing to negotiate.