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 at Amazon.com
Apple MacBook Pro |1278 | Core 2 Duo | RAM 4GB | 256 GB SSD – iPoint
Apple MacBook Pro (2011) A1278 I5 2.4 GHz 4GB RAM 500GB HD (OSX El Capitan) | eBay