No I wouldn't say prices are coming down, I've been following the prices of all T6 models for months before I bought mine and I haven't seen a reduction in prices yet.
I also work in the motor trade which helps me keep an eye on values in general.
I missed out on a van being sold on here and that one was sold to cheap and this one is also to cheap £39995 is what that should be advertised for if its bodywork and service history are spot on.