TigerDirect.com is offering the Crucial Ballistix Desktop Memory Module - 4GB, DDR3-1600MHz, PC3-12800, 240-pin DIMM, 1.5V, CL9, Non-ECC, Unbuffered (BLS4G3D1609DS1S00) for a good price.
Google Price : $36.76 ~ $61.19 Shipped
1. TigerDirect Price : $19.99 Shipped