CRJ200 First Officer relates being assigned to ferry an aircraft with a spoileron fault that is not deferrable late in in the duty day.

Narrative

Aircraft had been returned to gate for Flight Spoileron Fault. Aircraft was not dispatchable and we were asked to ferry the plane with a flight control issue. This would have resulted in a departure at approximately XA00L and arrival at XB30 at best and most likely later. Crew would be well into the 12th hour of duty and even later into the day after waking up and working on the back side of the clock. Situation was not approved for an MEL and if other flight control problems presented or engine failure occurred would have resulted in challenging situations. Aircraft was being moved away from a location with 2 operators on the field that conduct CRJ operations and have trained maintenance personnel. The were a large number of hazards to the flight and very little benefit outside of monetary to move the aircraft for the risk involved.Situations involving flight controls and or engines and ferrying aircraft should be evaluated utilizing a risk matrix to determine if conditions are appropriate.