The 2000 Porsche Boxster is available as a 2-door, 2-seat convertible. Starting at $41,430, the 2000 Porsche Boxster Base (M5) is powered by a 2.7L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 20-mpg in the city and 28-mpg on the highway. The top of the line 2000PorscheBoxsterS (M6) , priced at $ 49,930 , is powered by a 3.2L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 26-mpg on the highway.