Ok so we are planning our wedding but we haven't bought the ring yet. He's letting me pick my ring out. My dad's cousin recommended her jeweler and my dad and I went to meet him today. He seemed great and trustworthy but since I don't personally know him, I want to be on the safe side. He does not have a shop, he only does business through referal. He buys diamonds and settings from the manufacturer and sells them to jewelers. He does this from his office at his family's business. I checked the website and it does have a small section about it for contact purposes, but he does not advertise. He had a beautiful diamond that has a UGS mini certification document with it, but I don't know how trustworthy that is. Now since I'm buying it directly from him and not from an actual jeweler it is a lot less expensive. Of course this makes me suspicious, but my dad and his cousin trust him and the diamond completely. He does guarantee that he will buy back his diamonds for at least 90% of what he sells them for. My dad's cousin actually took him up on that and he came through. Now it's appraised for $8600 and he wants to sell it to me for $2900 including setting it, sizing the ring, tax, everything. The diamond is 1.02 carots, E, SI2. What do you think?