Generally, the thinking is a 10%-20% premium should assigned to cars with full service history. Of course, this is buyer specific - some buyers are willing to pay more for a car that includes documentation showing that the car was well cared for. Alternatively, others buyers may not add any value for this info.
As to dealer serviced, I don't think that there is any additional value (beyond that noted above) just because the service and repairs were done at a dealer vs an independent shop.
To me personally, it would be nice to know the service history but I wouldn't pay a dime extra for the information.
Ok, maybe a dime, but not a quarter.
(FYI - my wife is an infomaniac. She keeps a log book of every single dollar spent on her cars - all maintenance, all repairs, and yes, every single time she fills gas. She has done this for all 34 years that I have known her. It has never been worth any amount of $$ worth mentioning, if anything, when re-selling any of the many cars that she has owned over the many years.)