That's not a bad price.
Anxious to see some videos from the X550.
Also note that it is the Front only, and BlackBoxMyCar does not have the Rear camera available. The page results in a 404 error.
F750 Rear camera is the right one for X550 since the right angle of the F770 won't really work on the front camera
You could put the right angle on the rear though but straight tip is generally preferred for installing on SUV/Hatchbacks.