Are coins that are rated by WCG reliable or not? What I mean is the coin rated by them true or not?

Answer 1

There are a lot of TPGs out there, and the most important thing is to see whether the grade assigned on the holder is justified, and not some coin slabbed MS70 that's at best a 65. Remember that you are buying the coin, not the holder. For me, unless I'm looking at a coin in an NGC, PCGS or ANACS holder, I won't consider buying or bid on it. Hope I have answered your question.