If you are looking for study materials, you'll find a nice array of "near new" condition books in the yard sale section:
Mechanical PE Sample Examination by Lindberg (2nd Edition) $40
http://engineerboards.com/index.php?showtopic=20666
Six-Minute Solutions for Mechanical PE Exam: Mechanical Systems and Materials Problems 2nd Edition $50
http://engineerboards.com/index.php?showtopic=20665
2011 NCEES Mechanical Sample Questions and Solutions - Mechanical Systems and Materials $30
http://engineerboards.com/index.php?showtopic=20664
Mechanical PE Sample Examination by Lindberg (2nd Edition) $40
http://engineerboards.com/index.php?showtopic=20666
Six-Minute Solutions for Mechanical PE Exam: Mechanical Systems and Materials Problems 2nd Edition $50
http://engineerboards.com/index.php?showtopic=20665
2011 NCEES Mechanical Sample Questions and Solutions - Mechanical Systems and Materials $30
http://engineerboards.com/index.php?showtopic=20664