APMEX via eBay offers the 5-troy oz. .999 Fine Silver 2013 China Year of the Snake Bar
for $169.99 with free shipping
. That's the lowest total price we could find for five of these 1-oz. bars by $55. It comes in a plastic case.
Update: The price has since dropped to $163.46 plus $4.95 for shipping.
Note that silver is currently trading at around $28.69 per troy ounce.