I suggest you don't waste your money on the 2009 kawasaki ninja 250r. Unless you have the money, they tend to wear their enjoyment out very quickly and people don't seem to enjoy them as much later. Also buying them brand NEW is especially not a good idea because the resale value is a lot lower than the 600's or 1000's.
However, if you're just looking for a price i'd say
BASE MSRP(US) $3,999.00
You can probably find some even cheaper depending on the dealership in which you buy them from.