If the CBR is clean enough, I'd certainly think about it. Do you know anyone who can go look at it with you who knows bikes?
My next bike is a toss-up between a Hayabusa or an FJR1300. On one hand I would like a sports bike, but on the other I'd like a sports tourer.
If you shop around there are plenty of FJR deals for an older version that may even come with the panniers & top box included, saving a fortune in the process. As long as it had decent mileage, good nick & hopefully a service history, I see no problem buying a bike that age. There's no harm in having an AA type cover as well - a must for abroad touring as well.