Modern Coin Mart via eBay offers the American Eagle 2013 $5 Uncirculated 1/10-oz. Gold Coin for $142.95 with free shipping. That's $14 under our July mention and the lowest total price we've seen. (It's a current low by $112.) It contains 1/10 troy oz. (3.1 grams) of pure gold.
Note that gold is currently trading at $1,225.50 per troy ounce. All sales are final and this item can't be returned.