One must be ruled by the head and not the heart in these circumstances.
Your residuals will be severely affected when selling on a bike with a high mileage.
Also, the average amounts of farts the seat foam has absorbed in a high mileage bike, will lead to the possibility of one or more of these farts containing ecoli or the nova virus.
Veruka's are more likely to be caught from the footrests of a high mileage machine, or warts from the handlebar grips ... unless the bike has been owned by someone from Hampshire, where it is well known that the residents shower twice a day, and wash their hands after every pee.
Beware of pre 2007 bikes from surrey, as traces of foot and mouth may still be present within the crevices of a high mileage machine.
Beware of high mileage machines from Scotland, as these machines will have been riden by drunk people who have no sympathy for engines whilst in this inebriated state.
Beware of high mileage machines from Ireland, as Guinness fumes permeate through the skin, turning seat foam into solid black tar, which, if you take your bike to the continent, with its high temperatures, will melt and leak onto your tyres causing you to fall off on an alpine hairpin, resulting in a 2000ft plunge into the valley below.
Beware of the foreign import high mileage machine. These might look ok to the casual observer. Their lack of rainfall and hot average climate may keep rust at bay, but aluminium alloy in close proximity to garlic or bratwurst, will rot from the inside-out, so a seemingly unblemished crankcase may only be 1mm thick, and may collapse under enthusiastic throttle usage.
As long as you take these things into consideration, you should be ok.