A-Tech 4GB RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010, Mid 2011, Late 2011), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Module
Apple iMac 13,1 - 21.5" 2013 - Core i3-3225 3.30GHz 4GB RAM 500GB HDD - Good 603784376509 | eBay