Crucial Ballistix 4GB (2 x 2GB) SDRAM DDR3 1600 (PC3 12800) Memory $16.99

Newegg.com has the Crucial Ballistix Tactical Tracer 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory for $16.99 with Free Shipping.