its a difficult one, what sort of vehicle are you looking for.
i can only speak regarding the vehicles i have been watching the last couple of years.
the mini countryman has been pretty flat within £250. i am on wpms and a while ago the cooper s auto was zero ap it went up to 500ish its now 205. the spec has changed a bit in that time they did away with the chilli packs etc and now do classic sport and exclusive.so over 3yrs its not moved much.
the toyota hcr when it first appeared the top spec was zero ap on wpms and went up gradually to 250ish but then it disappeared and came back as a hybrid with much larger ap’s.
this at the moment seems to be a pattern the ice vehicles are going off the scheme and coming back as hybrids of some sort but with much higher ap’s. not good.
the bmw i3 has gone down this quarter which is a good sign given the gerally high ap’s of electric offerings.