Just frames and tanks? No engines submerged in oil?
I don't think you'll have much luck moving that many frames. Unless someone crashed their frame, you can always strip+blast+coat old frames and they're almost as good as new, as long as the bearing surfaces weren't ruined...
The gas tanks would probably be much easier to move, as those are irreplaceable in the original new condition like you have.
In any case, great find. I miss my old Jawa, I'd totally build one up again. Always leaves one to think what else is hiding in barns around the world... maybe some classic Japanese two stroke madness