New advice on buying a new car

[HiImBrian]

These numbers are all rough ideas since I didn't have a change to get in and drive the car yesterday.

Assuming I could get the car for $22000, I could put $6000 down and then have 0%APR for 36 months with roughly $300 payments each month. So what about the last $5200...at that point an interest rate would kick in assuming I haven't paid the car off yet. I plan to pay the car off well before the 36 months. I just like the idea of having low monthly payments in case something comes up.

Anyways, kbb estimates this same 2011 wrx to go for roughly $27000 from a dealer and $25000 private party. My thought is if I buy this car for say $22000 now, I'll have a $3000 "buffer" for when the time comes to sell the car down the road. Does this make sense and if so, is this a valid reason to chose the 2011 wrx over the 2006 wrx wagon?

Sry I'ma newb when it comes to buying a nice car lol.