Now, I wondering GIA Vs IGL Vs EGL - price difference sometimes substantial, not sure, what to do. Like I found a guy on Ebay selling 3.65 carat with 30 day money back guarantee 3. 63 carat- He said GIA will not come back with less than K color grading, SI1, ex cut and clarity. First, of all I don't even know what is the turn around time for GIA lab to grade it and send it back. He would only take bank wire, he has 100 % rating on EBAY, gave me his number. What do you guys think ? Is he legit, the diamond looks ok in the video. He is asking $21k. Seems low for a 3.65, I could be wrong. Please help.