I have posted these fakes in our German board
http://www.goldseiten-forum.de/index.php?page=Thread&postID=458842#post458842and that's how we solve it over here

My friend, wassergeist or 4wassergeister, bought just all coins available - it's an efficient way to stop these guys

You can distinguish the 1 Kilo Tiger fake by looking at the "line" going through the first "0" of "300" and, as far as I understand, there are no longer silver coins in plastic pouches.
Sorry, can't upload a picture here to show clearly.
greetz anwir