The 2007 Mazda B3000 is available as a 4-door, 5-seat regular side. Starting at $19,675, the 2007 Mazda B3000 (M5) Regular Cab is powered by a 3.0L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 23-mpg on the highway. The top of the line 2007MazdaB3000DS (A5) Cab Plus 4 , priced at $ 22,430 , is powered by a 3.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 22-mpg on the highway.