It's been awhile since i've done a silver transaction. Most of it is in the trusted business relationships you develop over the years. You want to buy and sell with a reputable dealer that has a sterling reputation. If a guy has had a brick & mortar establishment for the past 20 years ... he's probably legit.

Ebay is fine for a lot of things but i don't think i would want to do PM's there. That wouldn't be a good choice.