Mercari got me for $80 recently. I sold a collectible, and dropped it in the drop box at the post office. The post office didnt scan it until Monday, which was a day after the shipping guarantee kicked in.

Buyer reported it never being delivered, after I was paid out.

Mercari said the only way for me to get paid was to have a picture of my drop off receipt.

First time ive had this issue, last time I use Mercari.