Nuname, when was the last time you had to justify the cost of putting an N-reg on the JAR registry to an owner, when he could have just as easily left it on the N-reg and saved himself a bundle? When was the last time you had to explain that a certain STC/mod was not allowed purely because of the letters on the tail? When was the last time you had to justify time limited components or an inspection interval on a particular aircraft purely because it was JAR registered?
Peter, I have personally owned several N-reg and JAR registered aircraft, and have been directly involved in the ownership of others on both registries and know very well the differences in operational costs.