I am no help with stuff like this. The only suggestion I can make is try to send it to a grading company to see ahat they say.
As far as the white stuff on it, this is some type of mold and is fairly common. I have heard exposure to sunlight will make it go away but I have also heard of people who put these types of things in sunlight where there was extreme heat and they had bubble warping.
I have caviar dreams and McDonald's pockets