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.
Frugal isn't smart if you put off replacing these things. Waiting too long can cost money or even endanger your health.