On ebay people will create fake purchases in order to get a 100% rating and then scam people since people are being far more judicial about who they're buying from.

Just a recent example I had.

I was looking for a new camera. Finally settled in on a Fuji X-T3. The prices on legit camera places like B&H, Andorama and MPB were running around $800 for an excellent condition body. It went down from there in price. Found a body on ebay for $790. Right price, albeit a bit less and for a silver body. There has been an increase in demand for the silver body since Fuji announced they will no longer make them. Most silver bodies have been pushed up over $800 for even a decent condition body.

After kind of going back and forth over whether I wanted to make the purchase, the seller messaged me with an offer of $750. I was leaning on purchasing, but just as an experiment, I sent Claude the link to the auction and asked if it saw any red flags.

Claude pointed out it was a fairly new account within the last few months. Yes, it had 100% seller rating, but they only had six sales with zero user feedback. They also were not accepting returns. For a $700+ purchase, this was too many red flags and I ended up getting something off of MPB instead.

I believe this is the scam. Set up two accounts. Sell one account to another account with a fake user and address. In this case, your address. Ship useless stuff to fake account, boost your rating in order to ease people's anxiety over ordering from someone with less than 100% seller rating. If the person getting the useless junk emails you, say you'll send a return label, then never do it.