Don't do it !!! my dad was a car salesman for a very long time so I know a lot of what they do to screw people over and make more commission. go to a credit union for a loan, they do lower interest rates for auto loans compared to the regular banks. this salesman is trying to take advantage of a 19 year old kid that he assumes knows nothing ! I looked into buying a 2013 wrx a while back and the salesman told me I am going to need a co-signer, before he even knew my credit score, which is 700+ and said its about your credit history, not just the credit score. it sucks I couldn't buy my dream car but I will own one some day
I hope you get it figured out man.