I just pulled this off the US Customs and Border Protection site - trade - internet purchases
This seems to be the standard flow for buying something. I am not an expert but this looks like what most handbag buyers would be dealing with.
Postal Service, Couriers and Freight
There are three ways goods can be sent to you from abroad. In order to avoid costly problems, you and the seller of your goods should agree on which will be used the international postal service, a courier service, or freight carriers.
International Postal Service: Merchandise shipped through the international postal service is forwarded upon its arrival in the United States to one of U.S. Customs and Border Protection International Mail Branches for clearance. If the item is less than $2,000 in value and is not subject to a quota or is not a restricted or prohibited item, a CBP official will usually prepare the paperwork for importing it, assess the proper duty, and release it for delivery. This procedure is generally referred to as a mail entry.
Packages whose declared value is under $200 ($100 if being sent as a gift to someone other than the purchaser) will generally be cleared without any additional paperwork prepared by CBP. However, CBP always reserves the right to require a formal entry for any importation and generally exercises this option if there is something unusual about the importation, or if important documents such as an invoice or bill of sale do not accompany the item.
If any duty is owed, CBP will charge a processing fee for clearing your package. Duty and the processing fee are usually paid at your local post office, where your package is forwarded.
Hint: To speed a package through CBP examination at a port's International Mail Branch, the seller should affix a completed CN 22 or CN 23 (U.S. Customs and Border Protection Declaration Form) to the outside of the package. This form may be obtained at local post offices worldwide.
Plus: Pretty economical.
Pitfalls: If the item's value is more than $2,000, it may be held at the mail facility until you can arrange for a formal entry. This may require either hiring a customs broker to clear your goods or you may file the paperwork yourself.
Lost packages are hard to find. Since most packages sent through the mail do not have tracking numbers unless they are insured or you've paid to have a tracking number, it can be impossible to trace a "lost" package. If a package is lost a "tracer" should be initiated by the sender of the package.
This part is the warning message
Can you trust the seller to provide accurate information about the item being shipped in the Customs section of the shipping documents? Giving misleading or inaccurate information about the nature of the item and its value is illegal. And it is the importer - YOU - who could face legal action and fines for this violation!
For example, antique silver teapot, silk kimono, 18-karat gold rope necklace. It is very important that this information be detailed and accurate. What is described here will determine the classification number and duty rate that Customs assigns the item when it arrives in the United States. If this information is inaccurate, you could end up paying the wrong duty rate for what you purchased. If it is inaccurate enough to seem deliberately misleading -- keep in mind that CBP does randomly inspect packages -- your goods could be seized and you may be assessed a fine.
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Back to how I read it...
Surely if there is a problem, some paperwork should emerge with a stern warning letter and a fine. Followed by the release of an item. But nothing at all...
