has the HGST 3TB Deskstar Coolspin 3.5" SATA III Internal Desktop Hard Drive Kit
available for $119.95 with free shipping. Compare at $199.00.
Shooting in RAW gives you the advantage of a lot of flexibilty in post-processing; the biggest disadvantage is an increased need for high-capacity storage. This is a very reasonable price for adding a significant amount of storage to your system.