Make sure to watch the fiat website. http://www.fiatusa.com/en/incentives/offers-model/?ccode=CUX201707BAFH27A
Also ask about local discounts and incentives.
In addition, signup with fiat because they will send coupons. I just received a $500 off coupon (non-transferable.) which starts 8/1 (too bad. i already bought my 124 spider).
They also sent me an offer to get a $50 gift card if I test drive any fiat. Ill be heading back to the dealer to complete that offer.
One of the signup sites is here:
https://www.fiatusa.com/en/sufu/?vehicle=fiat_124_spider&year=2017&disable_ssl_redirect=true
NOTE: August incentives will likely be released around 8/5.. typical 5 or so day lag when one month ends until the next month is published.