You may be able to save as a morph preset and sell it making sure to advise customers they need to purchase the morphs you are using ofr the preset witll not work but I do not think the Transformations would be saved by a morph preset.
It is not sellable if you use any morphs and just turn the morphs into your own morph. That is a no-no.
You can use Hexagon or ZBrush or another program to make your own morphs and save those and THEY are sellable as long as they are all original.
As far as scaling, I BELIEVE (and I could be wrong) you can export a character with scaled transformations and use that as a BASIS for an original work, but selling what amounts to just a re-scaled Genesis may be frowned upon.
Can any more of my more learned colleagues weigh in on this?