The only thing you have to concern yourself with is is there anything added to the car you will be buying in terms of service or extras etc, e.g certain things as standard from 2008 onwards, this can be common enough as a car progresses through it's life from manufacturers. Then are those features worth the cash.
Call around other dealers to see if they are increasing their prices on a similarly spec'ed car.
I would have serious doubts to whether the increase was anything but to line the pockets of the dealer. You have remember most of the cars that will be sold in the first couple of months this year would have been ordered at last years prices.
It will be your choice, but so far as to say, if you think the car is worth it, pay. If you don't then don't pay. But it would not take much to make a few calls to see what it would cost in other dealers around the country.
hth