That seems quite high as an individual price for those services. What year is the car - don't forget that once its out of its original warranty the servicing is cheaper, so if you're getting quotes on a car thats quite new they won't be accurate because they won't include the discount you'll get for the second service.
I had the major service on my M340i and it was about £600, brake fluid is about £115.
I've just checked the service plan pricing again and have compared it with the individual cost of the same services and it's actually a useful saving now - it works out at about 15% cheaper before accounting for any price rises in the servicing cost by the time we get to 2028 when the last one is due. I'm therefore considering it now.