Quad-City Coin is not accredited with the Better Business Bureau and as such cannot receive complaints or comments via the BBB which is why they have a BBB rating of "A". If they were actually a member of the BBB, their rating would more likely be a "D" or "F". With that said, my experience with this establishment was the worst I have ever had in any commercial establishment and I am surprised the business is still open. I was offered far less than reasonable value for proof coins I was wishing to sell, and when I refused the offer I was hit with a barrage of swearing and hateful speech. From the other reviews I have read, I am not the only person to have experienced this.