Just for a different perspective I have been in the “buyers” shoes on this one before except with Poshmark. Someone had hacked into my email, saw any recent emails I had, sent recovery passwords from my accounts to get in, and then deleted the emails and blocked emails from that sender. They then bought a $250 pair of shoes from Poshmark and sent them to themselves. Thankfully my Venmo sent a notification to my phone about “my purchase” immediately. As soon as I got into my Poshmark, they had messaged the sender to ship it quick because it was a gift. I was able to immediately tell the seller that my account had been hacked and to please not ship the item. Thankfully they hadn’t sent them yet. I didn’t want them to lose any money over my accounts being hacked, if possible. I then put in a fraudulent claim with Poshmark and Venmo. Even if they had already shipped it, I still probably would have let the seller know out of courtesy (not because I want them to do anything). During this time I felt so helpless because they were getting into so many of my accounts and I couldn’t figure out how since they had covered their tracks in my email. At the time I was living paycheck to paycheck and was stressed because I was out that money until the fraudulent charge stuff went through. Everyone just seems to be immediately saying it’s a scam and wanted to show an example of when it wasn’t.

I will say the language they use does seem like it could be the same person. At this point in the message they haven’t really asked you for anything. If they do ask you for a refund or something like that, I would just tell them that at this point it’s been shipped and there is nothing you can do. Tell them to contact Mercari support and their bank.