Picked up two DirecTV satellite boxes

[radiotvnut]

A friend noticed a pile of stuff at an apartment complex dumpster and found two direcTV satellite boxes and two Motorola Comcast digital cable boxes.

Both of the direcTV boxes are from 2010 and have the cards still in them. One is an HD box and has a single coax input for the satellite dish and various other non-RF outputs.

The other one is a standard box with an "antenna in" jack, a satellite in jack, and an output to TV jack. My question is does this box likely contain a built-in DTV tuner or is the antenna input jack simply a pass-thru?

I connected both Comcast boxes to my cable, just to see what would happen. One of them changes channels; but, I can't get a picture on any channel (probably needs to be activated by the cable company). The other one stays on channel 0 and won't move.

I figure these boxes were left behind in an apartment that someone moved out of and were thrown away when the apartment was cleaned up.

Do these boxes have any resell value or would I be better off scrapping them for what parts I can get out of them?