Apotop Vulcan 8GB (2 x 4GB) 240-Pin DDR3 PC3 12800 Desktop Memory for $58.49 shipped after  ode VISACHECKOUT as detailed here.  Here is a screenshot for reference.  This set of desktop memory runs at DDR3 1600 speed and should work in most computers that use DDR3 with its 1.5V specification and timing of 9-9-9-24.