Some recent social game design auctions on eBay:

Mobile & Social Game Design: Monetization Methods and Mechanics (Paperback or So

$63.20
End Date: Saturday May-5-2018 11:43:17 PDT
Buy It Now for only: $63.20
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Mobile & Social Game Design: Monetization Methods and Mechanics: Monetization Me
$63.19
End Date: Friday May-11-2018 17:18:03 PDT
Buy It Now for only: $63.19
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Mobile & Social Game Design : Monetization Methods and Mechanics, Paperback b...
$49.09
End Date: Thursday May-3-2018 18:43:49 PDT
Buy It Now for only: $49.09
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