Hello Mr sjmiller,
I am the vendor of this beautiful Peterson's.
Honestly, I don't know how much time it takes between Garden City in NY to your destination, I just checked that the distance is around 670 miles, in my opinion, it should have reached you indeed, but we are still in an 'acceptable' lead time. I am wondering if during summer, USPS employees on holidays are being replaced by temporary workers.
I really hope that there won't be any issue and that it arrives safely :/ Of course, in the worse case, you are protected by the Paypal customer service and even if it was not the case, I would refund you as I am responsible of the shipping till it arrives in your hands.
Here is another comparable Peterson's I am selling : http://www.ebay.com/itm/321803681206?ru=http%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_from%3DR40%26_sacat%3D0%26_nkw%3D321803681206%26_rdc%3D1