If you're in the US, then I'd recommend checking: http://www.apmex.com and http://www.europacmetals.com/our-products.aspx
All of these guys are well known and trusted http://www.monarchpreciousmetals.com/ http://www.providentmetals.com/ http://www.gainesvillecoins.com/ Have Heard of these guys, but I don't know anything about http://www.preciousmetalhouse.com/
Be careful when you use the word trusted. I cannot speak about Monarch, but provident and gainesville both sent me damaged coins/bars and refused to do anything about it. You will get the purchased product, but it may or may not be in the condition they advertised.
