The 2012 Mitsubishi Eclipse Spyder is available as a 2-door, 4-seat convertible. Starting at $27,999, the 2012 Mitsubishi Eclipse Spyder GS Sport is powered by a 2.4L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 27-mpg on the highway. The top of the line 2012MitsubishiEclipse SpyderSE , priced at $ 28,299 , is powered by a 2.4L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 27-mpg on the highway.