Well, you guys have pretty much scared me off of buying one of these.
Lets put some things into perspective. No matter which K 1200 LT you decide you want to buy, you are going to be buying what is a luxury vehicle that is now lets say on average 15 years old.
Being a touring bike many of them if used as intended will have high mileage, some do some don't.
When you come to the average vehicle based forum you will find that most people come here to talk about some kind of problem they have with their new toy. Not many people come on to forums to talk about how their wonderful machine is ticking along flawlessly, people love to complain, that's human nature.
Luckily when you come to this forum where yes of course many of us talk about the potential problems you also find that many of the members have been there done that and have the answers to your questions. Many of these answers can save you thousands of dollars in repairs to these now old bikes.
Personally I decided I wanted a BMW K 1200 LT and with out doing much research at all went out and bought a very nice looking 2005 model with 91,000 kms on the clock.
I then found this forum and started reading.
I then started worrying and became almost afraid to drive out the front gate. What would go wrong on this trip I thought. Yes there was one time I ventured out and my ABS warning light came on.
I panicked and rode back home and after a short search found that my fluid was down in the rear reservoir. I bled the system and was back on the road the next day. I upgraded all the brake lines and it hasn't missed a beat since. If you are looking for a bike you can jump on and just ride without the thought of maintenance then this isn't the bike for you. If you go into it thinking that you will buy the best example you can find and then make improvements to it then you will be rewarded with one of the best rides bar none. I tend to treat my bike like an aeroplane. before you ride it check it over. When you come back quickly give it a check over.
Don't be put off by the stories of maintenance but remember there is also no shame in deciding you don't want that for yourself.