social game design eBay auctions you should keep an eye on:

The Aim of the Game: A Primer On the Use and Design of Gamed Social Simulations

$12.47
End Date: Sunday Mar-26-2017 22:52:01 PDT
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USED (VG) The Aim of the Game: A Primer On the Use and Design of Gamed Social Si
$30.72
End Date: Friday Mar-10-2017 10:50:19 PST
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Mobile & Social Game Design: Monetization Methods and Mechanics, Second Edition
$81.46
End Date: Sunday Mar-26-2017 14:33:09 PDT
Buy It Now for only: $81.46
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