I’ve bought gold and silver on more than one occasion from APMEX. Great people to do business with. I don’t see anything on their site about a buy back, other then the usual quote.
http://www.apmex.com/APMEXTop40/Default.aspx
I received an email from them about this.
After logging into my account, I see the $48.98 buy-offer; however, the buy-offer is only good if the whole transaction is valued over $10k.
http://www.apmex.com/Category/160/Silver_Eagles___Uncirculated_2011__Prior.aspx