To me, Chanel is the easiest preloved bag to buy and know it’s authentic because there are so many great resources (as opposed to other brands).
As @catsinthebag said, both Fashionphile and Yoogi’s are very reliable. I would trust anything I bought from them.
That being said, I’m super suspicious. LOL! So I get my preloved bags authenticated twice. You can utilize the tpf authenticators for free.
For Chanel, I prefer to use Etinceler for bags 150000 series or older. https://etincelerauthentications.com/
Newer bags (and even some older) I send to Leather Surgeosn to authenticate in person (and even do a refresh).
Happy Hunting!
Yay!!!
I only knew about Leather Surgeons as a refurbisher — good to know they authenticate as well!