The 2010 Mitsubishi Eclipse Spyder is available as a 2-door, 4-seat convertible. Starting at $27,799, the 2010 Mitsubishi Eclipse Spyder GS is powered by a 2.4L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 26-mpg on the highway. The top of the line 2010MitsubishiEclipse SpyderGT , priced at $ 32,599 , is powered by a 3.8L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 24-mpg on the highway.