Below are links to available CPC rate cards for each of the engines that we work with. Please note that if an engine is not listed, it is either free, or that rate card cannot be linked to.
NexTag - https://merchants.nextag.com/serv/main/buyer/CPCCatMinsPopup.jsp
Pricegrabber - https://partner.pricegrabber.com/mss_main.php?sec=1&ccode=us
Shopping.com - https://merchant.shopping.com/enroll/Rates.html
Become.com - https://docs.google.com/a/singlefeed.com/viewer?url=http://www.become.com/resource-center/become-rate-card.pdf