I paid 150.00 for mine, I bought them from a local guy that never used them. Here's Steeda pricing from their warehouse.
1979-2002* V-8 Sport Springs (set of 4) $189.95
1999-2002 Cobra Sport Springs (set of 4) $259.95
1984-2002 V-6 Sport Springs (set of 4) $189.95
www.steeda.com