I always put a lot of milage on bikes becasue i ride everywhere, everyday on it, my last bikes a TDM and a Tiger have all been sold with exceses of 50k showing on the clock and not had a problem part x or selling, mainly becasue i look after them and they don't look well used, saying that, normally I buy an oldish bike (about 5-6 years old) with very low mileage so that when I do sell it it's about average for the age, this is the first time I have bought a bike that had high (about 40k) mileage to start with, but was convinced a BMW had only just been run in at that mileage.
To be honest I wasn't aiming to buy a GS, I was after a Caponord or the New KTM, which i like very much, but the down side was the Cap was still a little too expensive and not much knowledge on it's reliability and the KTM that I really liked was too Tall for me.
Saying that I have grown to like the GS and am starting to have fun on it, I use forums like this to get the best out of which ever bike I have, good or bad.
One thing I have learnt from riding bikes for years is that bikers are very pationate about their bike... what ever it is.
Enjoy your KTM, I would love to hear feed back on it.