Top end in the book is I think about 104 mph. Mine is very comfortable at 70 mph, though I rarely do this.
I reckon I get no more than 40 mpg or so, but I don't pay much attention to these figures.
Price is always subjective. For 05 plate and 2k miles, if in excellent cond. - £2.7k - £3.0 k would not be far out from a dealer. Maybe less if private.
Good luck