I have decided to trade it against a VW UP!
Some VW Up! owners are surprised how hard the ride is on the Up! This usually occurs because the new owner didn't understand that the springs that the Up! comes with out of the factory depends on whether the car comes factory ordered with 14", 15", or 16" wheels, and whether the car is an economy model with improved aerodynamics.
If the Up! comes in a version with improved aerodynamics and better fuel consumption than standard, then that model will have sports springs. Sports springs lower the car by about 15mm to improve the aerodynamics, but make the ride a lot harder.
Then there's the 14", 15", and 16" factory wheel options...
Cars coming out of the factory on 14" wheels have the standard springs and therefore the most comfortable ride.
Cars coming out of the factory on 15" wheels have harder front springs.
Cars coming out of the factory on 16" wheels have both harder front springs and harder rear springs.
If you want the best ride, make sure the car comes out of the factory on 14" wheels, even if you choose at a later stage to fit 15" wheels.