Some recent design social games auctions on eBay:

Social Game Design: Monetization Methods and Mechanics-ExLibrary

$6.99
End Date: Monday Jun-5-2017 13:28:28 PDT
Buy It Now for only: $6.99
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Social Game Design: Monetization Methods and Mecha
$6.94
End Date: Tuesday Jun-13-2017 11:50:00 PDT
Buy It Now for only: $6.94
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Mobile and Social Game Design : Monetization Methods and Mechanics, Second...
$47.42
End Date: Tuesday May-30-2017 10:43:29 PDT
Buy It Now for only: $47.42
Buy It Now | Add to watch list