I think common sense goes a long way with transacting in PM’s. Never trade on CL, ebay, etc. Use established dealers, trade coins (I only do coins) and good delivery list bars.
[quote=gzz]There are real 100oz silver bars that people inserted lead slugs into. this is pretty hard to detect as they are still going to be silver in the outer portion.[/quote]
There are some anecdotes of this happening with 100- and 1000-oz bars, but this is actually very easy to detect. Again, reputable dealers will nail these every time