Examples of this being...?
Van der Vaart himself, he cost £9m when Real bought him and they moved him on for a similar price even though he failed to win a place in their first team. Or Huntelaar who's been signed today for £11m by Schalke, Milan paid £13m for him last season and he was a major failure there - and well, Madrid only made a £3m loss on him as well and he wasn't convincing there either. Players with good reputation usually cost money.