Mamoon - Don Margolis' site is a referral site, rather like an infomercial. He is paid for his services. I feel that most of the doctors on his site are good, however, I do not agree on all of them. The price discrepancy can only be accounted for, in my opinion, by profit mostly and not hard costs. Do your homework. Don't get antsy and think you have to grab at the first thing that comes along. That is always a big mistake. Find out what kind of stem cells will be given and what type of extraction and manipulation will be done to them. Consider the travel if that is important. I will send you a list of resources by private message and I would suggest you write down a set of questions and then call and talk to the doctors yourself and see what you are comfortable with. I would try to avoid sales people as they sometimes are not really as up front as they should be. Some people, quite frankly, do not get good results after one treatment. Therefore, you need to think about what would happen if you were one of these people and needed additional treatment. Every day seems to bring some good news as well. What may have been relevant yesterday (witness the failure of the Osiris trial and the use of mesenchymal cells as the main factor) may no longer be what researchers are working on today.