2017 Subaru WRX STI Price: $23,800 Saint Louis, MO More Saint Louis, MO Subaru WRX STI's 2019 $35,545 Miles 2020 $38,588 Miles 2019 $34,489 Miles 2020 $39,655 Miles 2015 $23,857 Miles 2020 $39,695 7,000 Miles