I recently moved to cable and now I have (2) Direct TV receivers w/ DVR (Tivo) model RCA DVR 39. It appears that these units aren't used much anymore. Is there any value on these units or should I just pitch'em? Both have remotes, access cards, and at one time I wanted a larger hard drive for more recording capacity and so I actually bought the hard drive but never found the time to install it. Both units are bone stock original equipment.