Hi potential Grandscenicowner .... Great cars though they are (I've had several), I would'nt hold out much hope for more than £400-600 PX if at all .... really depends what they are making on the metal they are shifting to you .... best bet is a private sale, but on a good day I still reckon less than £750 ....
A 13yo car with nearly 140k. Not much.
Your best bet is to target the school run market.
Many families get involved in lift shares that require 7 seaters, a notice on a school board may help. Many are looking during July/August for a September start.