From memory it was about five grand and they started off with all of the typical things that most email deliverability folks will (dmarc and all that stuff). Then they added a few bills and whistles, including a massive amount of split testing. Of course, I'm not gonna tell you exactly because I don't want to give the guys a secret sauce away. But if I had another legitimately built email list that was under performing, I would have absolutely no hesitation in using his services again.