I purchased these books new and used them to study for the April 2010 exam, which I passed taking the first time. All are on Ebay auctions.
Practice Problems for the Mechanical Engineering PE Exam - starting price is $35
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...=STRK:MESELX:IT
Mechanical PE Sample Examination (Companion to MERM) - starting price is $30
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...=STRK:MESELX:IT
Six-Minute Solutions for Mechanical PE Exam HVAC and Refrigeration - starting price is $40
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...=STRK:MESELX:IT
Practice Problems for the Mechanical Engineering PE Exam - starting price is $35
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...=STRK:MESELX:IT
Mechanical PE Sample Examination (Companion to MERM) - starting price is $30
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...=STRK:MESELX:IT
Six-Minute Solutions for Mechanical PE Exam HVAC and Refrigeration - starting price is $40
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...=STRK:MESELX:IT
