I have looked at the pics of this a few times and I honestly can't believe how good it is. I think it's probably the mintest, lowest mileage, original standard cab that I've ever seen and I don't particularly like white cabs. I really hope your MIL can get good money for it as it does not deserve to be sold cheap and if you do sell it cheap I guarantee that the person who stole it off you will cash in and sell it for more.
That looks well mint,except for that little stone chip you mentioned Gibby. £3-5 to £4k Dai tell the MIL to loose the hoody in the pic
Put it up for £4.5k on pistonheads and go from there! Looks lovely though.