If you just want to replace your springs, get on Craigslist and pick up a used set for next to nothing. You shouldn't have to spend more than $50 for a set of used non-M sport package springs.
1998 BMW 328is Shooting Brake
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild