This is a very rare item and only the third I have seen. It is, unfortunately, missing a fair amount of paint but the windows are intact and clean, apart from a crack where the Trans-o-lite system joins. The suspension is good and the lights work fine.
This will have been produced almost at the end of its period of availability, most likely for inclusion in the Gift Sets 48/41 where the other models on the Transporter may also have had the same style of wheels. I have the Hillman Imp, the Volvo P1800 Saint's car, Minis and Ford Cortina Estate from this set, for example, with cast wheels, the Cortina in blue, Imp and Volvo being similarly very rare items. If you're trying to rebuild that particular late edition of the Transporter Gift Set then this will be a valuable element that's hard to find.
When models like this come along it can be very difficult to price them in the absence of any others to compare them with. A good condition example sold recently for over £900, or £1000+.
Please note that the marks on the windows are where they were still wet after cleaning, not scratches or damage.