Some recent game design auctions on eBay:

Nintendo DS Game Lot - Pick & Choose - Mario Pokemon Batman Petz Lego Sims

$5.00
End Date: Saturday Nov-4-2017 10:36:44 PDT
Buy It Now for only: $5.00
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Game Design Perspectives by Francois Dominic Laramee (2002,Paperback) CD Sealed
$9.99
End Date: Sunday Oct-29-2017 6:52:27 PDT
Buy It Now for only: $9.99
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Procedural Generation in Game Design (2017, Paperback)
$57.20
End Date: Sunday Nov-12-2017 18:08:14 PST
Buy It Now for only: $57.20
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Triadic Game Design : Balancing Reality, Meaning and Play by Casper Harteveld...
$152.63
End Date: Wednesday Nov-8-2017 14:15:31 PST
Buy It Now for only: $152.63
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