http://www.responsib...calculator.html
use that calculator to determine the down payment you need to get your 250 monthly payment
once you go to a dealer never ever negotiate the monthly payment or you will get dicked.. always negotiate the cost of the car
http://www.bankrate.com/calculators/auto/auto-loan-calculator.aspx
this calculator says if you owe 13250 at 10% interest your payment would be $245
so if you get a 25,000 car you would need a $12,000 down payment to keep your monthly to about 250