same here my 2016 GT premium convertible 401a with 38k miles was $33,030 about 10 days ago. 5 days ago it was down to $29,000. I sold it to Vroom for the $33,030 , well over what I paid for it a year ago.
Have you considered using a local tuner if available? If I were in your shoes I would think twice before giving my hard earned money to PBD after what happened to you. Not pointing fingers, but it seems like bad juju to go back to PBD.... Just my $0.02
Sold the car. Used for less than 100 miles.
ACCELATEC Axle-Back Exhaust Kit 2-1/2" Stainless Steel With 4" Polished Tips GT 2015-2017. $250.00 with ground shipping to lower 48...