Would you like a R 850 R…

HI would like to introduce myself briefly, am 22 years young, currently living in Bavaria (near Regensburg) I already had a motorcycle at the age of 18 (Yamaha R6) at that time I had bought it new and throbbed on 34 HP, was not so awesome :-). Unfortunately I had to give this absolute dream machine, I say a two-legged being persuaded me to do it… It is too dangerous, she was afraid of me blablablabla…. Now I am alone again and can do what I want 🙂 Rter motorcyclist, if I see such a machine Ichts already powerful in the right hand… However, I don’t have to have R6 anymore, the things are really too fast for me with 130 hp, I’m out of the age 🙂 Have I looked at my dealer ne BMW R850R, I really find a dream bike. What do you have to consider when buying? Can I buy a used machine without any risk? How is that with the year of construction, was there anything changed every year? Have me so with BMW motorcycles no can you recommend the machine for a beginner without hesitation? How does it look like with the running maintenance? How old or how much km should the machine have on top of it? What about the quality and durability? Thanks already for the answers gruß marco