Everyone can buy a player from auction... If level 10 manager has the highest bid at the end, that player will have 3-star to 5-star quality for level 10 teams and if level 90 manager buy that one, the player will be 3-star to 5-star for level 90 teams... Players at auction are bought depending of their %, not overall quality... So, he will have the same % whoever bought him...