My experience is somewhat different than a lot of what's posted here. I am certainly not a big player, but I have been investing for more than 10 years and do many deals each year. I get the majority of my deals from wholesalers and the remainder on my own.
I have done a few deals with NWA over the last several years. I look at them no differently than any of the other wholesalers that I buy from. Their job is to go out and secure opportunities and to present them to me. My job is to evaluate those deals and either proceed or ignore. I look at it as I am paying a wholesaler for their time, marketing and negotiating to lock up a deal. Sometimes ARV estimates are high and sometimes rehab estimates are low. I have generally found their numbers to be within reason. I ALWAYS run my own comps and ALWAYS see the properties before making an offer. I often lose out to people that are buying "blind" or can operate on thin margins. If I cannot make the numbers work then I simply DO NOT BUY the house. I guess I just don't see any difference between NWA and how other wholesalers operate except they have a much bigger volume.