Bandit 250 is a perfect first bike
Bikes pre-1993 (I think) were 45bhp, and 1993 onwards are 40bhp
Acceleration to 60mph (roughly 100kmph) is about 6 seconds, it accelerates quite quickly up to about 80mph, and you should see just over 100mph from it.
I wouldn't pay too much for one though, as parts aren't the easiest to find.
I'd say about 1500-2000 Euros for a tidy private model