It is missing a color pass. Red is my guess like another board member stated. If it had sat in the sun that long, the borders would also be discolored to an extent. It just looks too even to be sun discoloration. Its possible it sat in the sun but who in there right mind would do such a thing? I realize it could have been displayed near a window but my money is on missing a layer or 2 of color.
Whoever paid that much has a few things missing upstairs and now has over $10,000 missing from his or her wallet!
Peace, Mike