The dragon appears to be malnourished and might have MBD based on the crooked spine. None of this could have happened in the less than week that you've had him, it was from previous husbandry.
What is your setup like?
And what does the daily diet consist of?
Looking back at the pictures, I can not tell if that spine looks irregular, or if the guy is just skin and bones. Getting him on a healthy diet and in proper lighting will work wonders in determining if that spine is ok, or if it has suffered effects from MBD.
-Brandon