A 12-pack and maybe some food is all it should cost, and maybe some blood, sweat, and tears.
I had some friends help me, since there's no way in hell I could have gotten the demon bolts, etc. off. I offered food, etc. for their services. I'm not quite sure I could have done the install solo - afraid I'd mess something up (not that there's anything outside of the O2 sensors to really mess up).