They work fast then hit you before you can think about what you are doing
By purchasing products online then having them shipped to you so you can reship them to the
scammer, most likely the products will already be on their way or in the scammer's possession
before the credit card comes back as stolen. That just leaves you to pay for the items or risk
the chance of being prosecuted for receiving stolen merchandise.
The reason they want you to repackage the items is because they won't have to pay the tax
for new items.