I bought a DirectTV HDDVR Model HR20 700 at a garage sale for $5. I figured the SATA hard drive inside it would be worth at least that much. Can this be used as a stand alone HD TV tuner and/or DVR without activating it with Direct TV? Is this model considered good enough to be current technology if I ever decided to subscribe to Direct TV? In other words I am wondering if its worth keeping as a unit or should I just salvage the SATA drive out of it and throw the rest away.