Only $91.67 per pill (actually, $275 for 3 pills since they are only sold in sets of 3). You can buy them on various websites, though 91.67 is the cheapest I could find, at the New Museum gift shop.
New Museum gift shop,$275 for 3 pills: http://gawker.com/334908/new-museum-let-them-eat-gold
Here is the link to the Citizen's Online page, where they would be selling for $425 each, but they are temporarily unavailable: http://www.citizen-citizen.com/collections/all/products/gold-pills
I was NOT able to find them on Amazon.