JM Bullion, Provident, Modern Coin Mart, Liberty Coin & Precious Metals, Silvertowne, Gainesville Coin, Goldmart and Monarch Precious Metals are good.
I've personally dealt with: JMB, Provident, MCM, Liberty, Gainesville, Goldmart and Silvertowne. The only one I can't vouch for is Monarch but I have heard they are quite good as well.
Do you work for TOPPS?
Since no one answers phones, emails or customer service inquiries via the website, hit me up about that 2012 Jim Brown Five Star Autograph. Thanks!