19.06 for the Canadian maple leaf here: Buy Maple Leaf 2011, 1oz Silber, Canada, 31.1 Gramm, 999 / 1000 at CoinInvestDirectThat's one way of looking at it, but they're still ripping people off. In Canada you can walk into any bank or post office and buy a full troy ounce(31.1g) silver Maple Leaf, with a metal content worth the equivalent of 17 today, for about 19, which covers the cost of the design and minting process as well as a small premium.
The coin you link has a real silver content of 16.65g. That's 150 for 166.5g of silver. In Canada, you would be paying 102 for the same amount. If you want to invest, you're not just going to buy in such low quantities and no real investor is going to buy German silver when then can get it for 32% less elsewhere.
Seemingly, European nations are less inclined to let the general population own precious metal at a reasonable price.
They have reached their limit for shipping to Ireland though