I don’t know that most buyers would be swayed by knowing that the brake fluid and/or coolant had been changed. A lot of buyers wouldn’t know what they do…
And its a mini – different set of purchasing criteria 🙂
I think the kind of buyer who would be interested in whether or not you’d changed a few fluids probably wouldn’t really believe you if you said you had.
In my experience – what sells cars for the best price is being honest about their short comings rather than bigging up their virtues. People are more assured by that sort of full disclosure (saying the brake fluid probably needs replacing than saying it has been replaced). People would expect to have to give a new old car a decent service anyway. Drawing attention to trivial merits makes people feel like you’re sugar coating it – that attention is being drawn away from serious flaws.