My own system (for PSA cards anyhow) makes me wonder if it's even worth it, it's such a PITA.
1. If offered by certain sellers, stop right there.
2. If serial number on PSA website shows first sale by certain sellers, stop right there.
3. Review scan thoroughly and if any doubt, pass.
4. If significant card, ask a couple of people whose opinions I value.
5. If still in the game at that point, check my spreadsheet of outed cards to see if in range suggesting it's likely from the same sub. If yes, probably stop or at least look into surrounding certs for anything suspicious.
6. Even if not in range of any outed card, if significant card, check surrounding certs for anything suspicious.
Ridiculous it's come to this.
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Net 54-- the discussion board where people resent discussions. 
My avatar is a sketch by my son who is an art school graduate. Some of his sketches and paintings are at
https://www.jamesspaethartwork.com/
Last edited by Peter_Spaeth; 11-24-2019 at 12:40 PM.
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