I have purchased from apmex 34 times and had 1 minor issue. The coin had a fingerprint on it. I complained about the unprofessional handling. Their response was conciliatory (as in open for exchange) but I did not pursue because I was able to remove the print with soap/water and pat dry.
So the only question is … are my coins fake? Unless you buy directly from the mint, this is a question that applies to any dealer purchase. I am not a coin expert so I can only rely on reputation and how long they’ve been in business. The only due diligence I did was I bought an Austrian Philharmonic from Liberty Metals Group in Del Mar and another one from apmex and compared the coins carefully. They look/feel the same so either they’re both genuine from Austrian mint or they’re both fake from China. I ended up believing the former. I’ve been going back and forth about getting https://www.thefisch.com/ because I still want to spot check a few coins once in a while.
Obviously, I trust apmex. Otherwise, I wouldn’t have bought from them 34 times.