Just common sense in Darknet

I know this sounds obvious but I feel like I have to say it anyway:

Fake tracking means you got scammed.

If a vendor gives you a "custom" shipping website, it means you have been scammed and you should dispute immediately.
All shipping is done through major carriers, so if you don't recognize the name, it means you have been scammed.
This scam is usually only pulled on victims in the USA.

If something feels too good to be true, it more than likely is.

No one in their right mind is going to transfer you 12,500 USD in Western Union for a low low fee of 3,725 USD.
Why would anyone do that?
They would have to have legit funds to send anything in the first place you can't just buy a Western Union transfer with a stolen CC.
It doesn't make any sense, which is why we can deduce it's some sort of scam.
I actually know this particular scam and will explain it for your benefit:

This Western Union scam is one of the oldest in the book.
They will send you a MTCN for you to check online, and the WU website will confirm that the transfer exists and is ready for you to collect.
You then transfer the BTC directly to the seller, or he gets you to release the escrow on the market because he will have got you to agree to after confirming on the WU website and feeling all giddy about all that money waiting for you.
While you travel to the nearest western union he has already cancelled the transfer, running off with your BTC and his own money he had to put in the Western Union. It's a very old trick, please don't think you can get anything free in life it doesn't work like that.

So we can also use common sense to conclude that any vendor offering this "service" is definitely a scammer.

Another one is balance transfers.
You think of someone wires you 10,000 USD to your bank account they will just forget about you and not hunt you down?
If you believe that I own a very lovely bridge just off San Fransico that I could sell you for a good price.

No but seriously guys, just think about everything you do before you do it and remember greed makes people stupid!