I just bought a 1.06 SI1 G with an AGS000 and H&A from USA Certed. They were amazingly helpful compared to these other vendors that I tried online. They helped out in every way possible and help you narrow down your choices. They have connections all over the country, so I was able to look at my diamond for a small fee to the appraiser before I bought it. The diamond was great and a good price at $5056. It was also that cheap because they matched the best overall price including shipping. They work on pretty low commisions. I would strongly recommend these guys. They have listings of more diamonds than are posted on pricescope at great deals. I would strongly encourage anyone who is in the market for diamond to go to them.