Are Core Curriculum for Oncology Nursing good enough for the exam of the nursing oncology certification? How about the price? Is the prices OK if I buy them from ebay, such as, http://cgi.ebay.com/Core-Curriculum-for-Oncology-Nursing-2005-Paperback_W0QQitemZ200415673636QQcmdZViewItemQQptZUS_Texbook_Education?hash=item2ea9b47d24

http://cgi.ebay.com/Core-Curriculum-For-Oncology-Nursing-2005-Paperback_W0QQitemZ200415674075QQcmdZViewItemQQptZUS_Texbook_Education?hash=item2ea9b47edb