OK Karasu, I'm just down the road from you. There are a lot of choices now on kijiji so they are out there. Buying at a Dealer maybe better but you'll pay for it. Most BMW owners are proud of their ride and will tell you where they got it etc. We just bought a used 658 off there and we're the 4th owners since 2010. Bought, traded in and serviced all by Wolf BMW in London. All records in place and even tho I bought private and had no intention of doing service there I was told to go for it. Great bike.
I'd prefer at least a 2009 but that's just me. Talk to the Dealer and get the history. The sellers package will give you the previous owner status. A lot of people buy these bikes cause of the amount of disposible cash they have and when the novelty wears off, they trade it or sell outright.
Recalls aren't time limited and as far as the rear wheel bearings go it's better the devil you know. Deal with it now and forget it. They're great bikes but not perfect. Just get a good winter price.
Life is a rollercoaster........and I'm not strapped in!