Well total cost minus the struts/shocks of your choice would be about $100.
I used all used Impreza stuff for my BG and on my BH the same except for the rear trailing link mounts and rear cross member bolts which I bought new.
I have pics of the difference in height on the BG but I'm still waiting on my BH suspension to get here from japan
Pics should be up later today.
-Dylan @ DS1