BMW Independent shops - tranny service quote $$$

[four.8is]

Went to 2 independent shops today to get quoted on a tranny filter and fluid change in my x5
Initially they quoted me 550$ which I was ok with but then they asked for the last 7 of the VIN and after they checked the type of tranny I have, the price went up to 1050$ .
They said I have the exact same transmission that comes on the 2007+ E70 4.8i and those have a mechatronic thing that has some seals and it's wise to change them cuz they start leaking at some point...and since they're dropping the pan anyway it's good to do those too...am I getting ripped off or what?that seems like a lot of money..
Called the second shop and they were a little cheaper at 850$ but still..for a fluid change , filter and seals?
What do you guys think?