Complex sentence: Prices of new Comanche 250s ranged from $21,250 (1958) to $26,900, which was only $3,000 to $5,000 more expensive than the Comanche 180.
Split into simpler sentences: Prices of new Comanche 250s ranged from $21,250 (1958) to $26,900. Which was only $3,000 to $5,000 more expensive than the Comanche 180.