When the scam involves receiving goods obtained using stolen credit card details this usually applies
3. I'll email you pre-paid USPS shipping label the day the package is delivered to you. This means you won't have to pay for shipping out of your pocket. Shipping labels are in PDF or TIFF format so make sure you have Adobe Acrobat Reader installed. You'll have to print shipping label and then take the printed label and the package to the Post Office. Please try to ship the package the same day the it's delivered, you'll get $45 for each package.
The scammer knows that the 'fence' has a very limited period before he gets the police at his door, so it's in his interests to encourage the quickest processing of each parcel. The scammer isn't being generous. He's only interested in the goods. Most 'fences' only manage to post one parcel before their job is brought to an end by law enforcement.