The 2004 Mitsubishi Eclipse Spyder is available as a 2-door, 4-seat convertible. Starting at $24,499, the 2004 Mitsubishi Eclipse Spyder GS is powered by a 2.4L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 23-mpg in the city and 31-mpg on the highway. The top of the line 2004MitsubishiEclipse SpyderGTS , priced at $ 29,149 , is powered by a 3.0L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 21-mpg in the city and 28-mpg on the highway.