on free garage sale dot com you can purchase by COD. It is a good idea to have a contact phone number to them. You can get a good idea of sincerity though email and phone call. Many of us have bought or sold or both. If one was making a large purchase, I would also talk with them on the phone. Do not do Paypal. It will be linked to that site and you will lose you account.
As far as the HCG, I already seeing a weight lose doctor, but not for the HCG. He didn't know I was doing it. I discussed it once with him and he said it wouldn't work. When I started losing 6 pounds a week he didn't bat an eye. You can order the homeopathic drops fromhttp://www.liquidhcgdiet.com/
I have tried both the injections (Novarel, purchased from freegaragesale) and the drops. The drops worked best for me. It made me really think about what I was doing.