The 2020 Ford Mustang EcoBoost Fastback starts with a Manufacturer's Suggested Retail Price (MSRP) of $26,670 plus a destination charge of $1,095, making $27,765. The convertible equivalent is an extra $5,500. The 10-speed automatic transmission is another $1,595. A Mustang GT with the 5.0-liter V8 begins at $36,725.Nov 8, 2019