Indeed diff. possible solutions and not everything else must be illegal, ease up people.
I am not sure if the Shaw win back offer requires a statement from Bell though, if so then he can't use it like that, but still may be someone who has current Bell account could use them, but not give back the actual (on same account) receivers and thus use these as substitutes (drones?).
Another use of course is for repair for those who have skills in electronics. Bell only has 1 year warranty so who would service them? Bell has never offered a repair service per se (not counting the refurb swap). I once had a friend's co-worker's 3100 which had a blown power supply, which my friend can't fix despite swapping out a few components already. Would have been nice to have a working one to swap components with instead, of course.
The 5900 one can pull out the IDE HDD although the value of these are next to little these days as HDD price has plummeted.
The OP didn't say if remote controls were included, because this is actually the most sort after parts / accessories because people damage them, loose them, or just want a spare. I'm sure the remote will sell very well.
Some parts inside might be useful for some electronics hobbyists, also, for projects etc. Not necessary illegal stuff. e.g. the transformer in the modem circuitry is very useful for noise isolation in an audio chain connecting digital domain and analog domain. Things like that.
Just some ideas.