Here's how it went down:

https://www.ebay.com/fdbk/feedback_profile/theperfectpart

Note that they’ve sold so much that even 1k neutral ratings are barely registering - they have “100% positive feedback”

I bought a cheap tool from this seller on ebay. Tracking number was provided showing my town as the destination. About four days later, I get an unprompted ebay message from the seller: “I monitor all my shipments and sometimes there are problems so I’m proactively sending you a new one, here’s a new tracking number.”

The original tracking number showed a message I’d never seen before “Item seized - counterfeit postage”. The new tracking number showed postage that had been bought back in January, but never entered the mailstream. Huh. I suspect that buys them time while they re-ship.

I did eventually get the item after another tracking number was provided.

My suspicion is that the seller uses counterfit USPS postage on 'x' number of packages to juice their margins. If you look at the neutral reviews, you can see a pattern — slow postage, lost package, had to replace, blah blah. Look at the positives — rave reviews at how fast things are arriving. Probably because the seller is “paying” for higher end postage via scamming the USPS.

And only when they get caught by USPS do they need to re-ship an item. They must get away with it enough to make it worthwhile

There are flats and there are books. Flats are a sheet of 20 Forever stamps that you would get at a drug store. A book is 20 stamps, used or not used.

Generally there are different values associated with flats because you can get cash for them on the streets. You can get them to the streets via an officer if you're ballsy. Or you can just find discreet ways to mail them.

The value of a flat where I was at was about $13-$14 depending on your vendor. A book was generally worth $10. If you were buying bulk (and depending on who exactly you were buying from), that number could go down to $12 and $7 respectively.

If you were buying from someone that was running a ticket (sports gambling) they had more incentive to get rid of their stamps. Some people had tens of thousands of dollars of stamps in their property and they wanted to convert them.

If you were buying from someone running a store (think "buy and resell commissary"), their business model was dependent on flipping books of stamps in exchange for more commissary. They could sell a ramen for 3 stamps ($1.50) when it was worth just 50 cents.

Flats were easier to hide because they are, well, flat.

I tend to just use one of the many late night shops doubling as a post office these days in the rare case I need to send something. Thankfully, the amount of paper arriving in my mailbox has been declining steadily. It's next to nothing at this point. Dedicated post offices are very rare now. But there are many of these late night shops doing post and packages on the side. They take your envelope, they print a label with some kind of scanable code, slap it on there, and take care of delivery.

The codes are basically short hashes that correspond to a database record confirming the correct amount was paid. Very hard to forge those.

No need to handle stamps anymore. Only for international postage.

Or so the story goes.

I hear that normally what the FBI would try in such cases is to lure people onto US or extraditable territory. IIRC there were some rogue Chinese chemists, who owned companies that sold fentanyl intermediates and were under secret indictment in the US, who were "invited to a VIP academic conference in Hawaii" and then arrested as soon as their flight landed.

Seems clear that this Pakistani is a bit more circumspect.