I like that fish....it is a sweet fish....I couldn't see anything wrong with it.
I see platies at my LFS in a bad way, torn fins and the like and have entertained the idea of buying one just to rescue it....I just worry that they may bring disease into my tank (I do have a quarantine tank but it has platy fry in it at the moment)....
Well done to you though!! I am sure it will have a great home!! Let us know how it goes