Automobile companies are coming with so many offers in the month of December, and lure people to buy vehicles during this period.
If you're planning to buy a vehicle in December, here's an advice: DONT BUY IN DECEMBER
The reason is because of resale value.
A vehicle registered on Jan 1st 2007 will have much more resale value than the vehicle registered on Dec 31st 2006. Because, first one is a 2007 Model, while the later one is 2006 Model. So its always better to wait for few more days and buy in January.
As far as possible try to get the vehicle registered in Jan, but buy it in December prices.
If you do not wish to sell the vehicle in future at all then this factor can be ignored.
Merry X'mas and new year wishes...