Alright, I agree and respect your experiance and others too of-course, thanks friends, the replies are really helpful, now I have a question, I have an other friend who is selling his Sprinter ECO 2007 model for 25k , I think now it's a quite comprehensive deal, according to him, he bought in 2009, since that time the bike is going great, just tunned up once and changed the mobil oil (of-course after 1000 KM). And nothing else, he says the engine is perfectly al-right though missing a couple of times but according to him, it's because the bike wants tunning.
So my friends, I will surely take the bike to a couple of machanics, they are experianced and some of them have real good relation (relatives) with me. So I trust them but still tell me the basic stuff, I ask to machanic to check, like he can't open each an every part to check but what are the nucessary stuff he can check and that can be helpful for me, while he is making the survey or taking ride?
Thanks once more, the help would be really great,