I am looking at buying either an old shape Renault Grand Scenic or Citroen C4 Grand Picasso secondhand. At the car dealers the Scenic screen prices seem to be way over the car guide prices such as Parkers, whilst the C4 Grand Picasso prices seem to be much closer. There is nothing to indicate the Scenics are in better condition. Any ideas why his should be? In terms of value for money if the Scenic were closer to the guide price I would be tempted - which do you think is the best buy of the two?