Obviously as it is a Motability list, final pricing will be decided by the relevant decision maker within Motability. That price is influenced by a number of factors not least the price offered by the manufacturers.
Very often when manufacturers have surplus stock or end of line models to shift, they will reduce price.
About 10 years ago Volvo were launching a completely new XC60 in the new year so the current model came on the list at an ap of about 2k. I ordered New Years Eve and the car was off the list the next day and never been on since.
Im hoping the i4 drops with the new one appearing but stays on long enough for me to order.