Demon370z

I went to the dealership to lease a 370z because I saw an add online that said it would cost $339 a month for 39 months with 3,000 down too lease a 370z. I called prior to entering the dealer and they said it would be 30 to 40 dollars more if you want in automatic. I always wanted a white 370z with a sports package w/ an automatic because I test drove the auto once before and it was amazing. The dealership told me that my monthly payment would be $469 a month for 39 months with $3000.00 down. I gave them my down payment and they said, your monthly payment is now $515 a month after they cashed the check. Keep in mind that they ran my credit score a the beginning of the deal and told me they can do it for $469.

Do you think $515 a month for 39 months with 3,000 down is a deal on a sports package 370z automatic? I need advice because this dealership brought me in thinking 400 a month and now im at $515....