So the parts costs with all the other parts needed to install that setup is around the price he said he would install it for so that's a good deal. Free labor is hard to find so I'm not sure if this is a real deal. The only issue is that sub isn't really all that much different than the stock sub. I would suggest going with the door speakers prior to that sub if money is a concern. You'll reap way more benefit doing so. Being that you picked a DSP amplifier is he tuning it as well? Something just doesn't add up to me. Unless he is a very close friend or family member I can't see any shop giving out this much of a bargain for a random customer. My profit margin on this including the install would most likely be in the negative. This is why I'm having an issue believing this deal.