The fact that the LHS gentleman has seen the airplanes and is speaking in terms of what you could get for them parting them out is pretty telling. From that alone I suspect that the airframes are pretty rough and may require much more effort to get airworthy than you may think. As far as them being worth large sums on E bay well I have my doubts about that.
At a hundred bucks a pop, sure they are definitely worth that. But be careful you may want to return to you orginal plan for a trainer if you want to get started flying and these ships are very likely 'projects' and you know what that can mean.
One last point and I have to say it. Cubs are very poor trainers if you need a trainer.
John