The need to keep (flight) crew current implies that the MOD hope to sell one or two of the E3Ds in a flyable state. In a recent article in Air Combat Magazine a member of the French E3F support organisation is quoted as stating that the FAF are interested in obtaining spare parts for their E3F airframes which I understand are the critical issue for long term support.
Their aircraft have been upgraded to the latest E3C standard including the extra consoles (total 14) so not much of the mission system except perhaps some of the heavy radar gear and antenna will be of much use to them. They have also added some French National equipment added making them a very capable ISTAR system.