Mr Whippy said:
... come resale, a great deal of your potential buyers will be doing what you are now, worrying about it.
Come re-sale? If you think you can protect your re-sale value by having a perfect service book, you are sadly mistaken. In 3 or 4 years time ... the value will probably be half of what it is now ... and there is nothing you can do to stop that ... just the march of time. The roadsters will keep on falling, and the coupés might stabilise at some point, and maybe even start increasing because there are so few of them (coupes are about 10 times rarer than the roadsters).
Having low kms and a perfect service book might make it easier to sell ... but sadly it doesn't affect the price you get very much. On the scale of importance, a late time service will be a total non-issue -- most people will be more concerned about any bird guano on the bonnet.