But again, you did not buy a new car, so comparing against buying new outright and/or taking a lease is irrelevant.
May be not, but for the specification you would pay silly money on a lease. Or even buying the car from new it's nearly a £20,000 saving.
Still not like-for-like.
I've just bought a C class with 2500 miles. That's almost new, so running a used car can be like a new one.
Plus if you're on a 2/3 year lease and want to lease again straight after, you're moving into a newer (higher value car) quicker than someone who is still leasing a 4/5 year deal. Most likely with fairly similar monthly payments.