With a 2017 build date i would push for mid forties i think
I got mine early and was the 1st 7.5 alltrack registered so paid full whack to get it quick and was 50k with all options on road i know some others who waited and got another 2kish off the price
So mid forties if you can haggle should not be a issue
Good pick the diesel is a great strong motor with heaps of torque
Plus you will love all the options the panoramic sunroof is great
Adaptive cruise is so good in heavy traffic
I love the digital dash (especially as its the r dash now thanks to obd11)
But the best is the dynaudio system never had a better sound system
Good luck with your purchase
Don't forget to let us know how you get on