I want a 2011 ktm 250sx two stroke, but i have a situation?

i want to buy a ktm 250sx two stroke but i cant find any one's used and for good prices.....actually, i would settle for a 08-11 model......but i dont want to pay all the money upfront and ktm's website does not mention any other method of purchase....is there a way where i can pay the amount in increments, say, each month? because i really want one but i dont have all the cash right now.....