For the last eight months or so I have been buying the needed parts to replace the rear springs and suspension components.  I am just replacing the old/worn out parts for new pieces.  I am not doing an aftermarket upgrade.
So at this point the only parts needed are both rear springs.  They cost a TTL of $330 or so.  So I will save up a little more then order those parts.  The plan at this point is to replace the rear suspension next summer if all goes well with the car and it being a daily driver.