How much should it cost to repair both control arms in the rear of the car?

Check it out in the estimator section of repair pal

I just had this done tomy'99 740i and in total it $330. $124 for each control arm from E-Bay and $80 for a local mechanic to do the swap out. Oh! I forgot the $130 to have an Allignment done. Not an ordinary job. Most places won't do it because car mustbe weighted.