What dealership?
They may in a way be doing your car a favor, it you have documentation for the brake fluid change and the oil-change being done, you have that to show how well you maintain the car.
And 70K miles is probably the perfect mileage for a trans fluid change - I'm a bit less enthusiastic about the trans fluid flush.
And a good time to do the coolant change.

I do understand your concern that your car is maintained well and the dealership is screwing your sale due to an inaccurate recomendation for service.