need opinions

hi guys! i’m desperately in need of the MAC secret, chestnut cocoa 🥲 have you guys bought through mercari before? do you recommend mercari? or what other places do you recommend finding one? i’m nervous i’m gunna get scammed 🥲🥲 i see a few listed on mercari, all different price ranges. or does someone here have one they’re looking to get rid of? thank you!!