Highlander crank seal with timing belt? on 2005 Toyota Highlander

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Our 87,000 mile 2005 V6 Highlander is about to get a Toyota replacement timing belt. One dealer says to also change the water pump, drive belts and crank seal. I understand the justification for the water pump and the drive belts but the crank seal? Should that be necessary on a mildly driven 2005 Highlander? Since replacing the drive belts and crank seal run the price up by an additional $206, I can do the drive belts. Is it necessary to change the crank seal? THANK YOU!
(1) Answer
I would get it done while its apart and always ask for the old parts back, Because if the seal fails 10,000 miles from now you'll have to pay to do the job all over again