I have found many sellers put on their cost on the packages - rather than the retail price they're selling it for. Of course for many new decks this is really in the $3-5 range.
I think this is actually the correct thing - that it is meant to be the person posting the package's (wholesale) cost. (Please correct me if I'm mistaken). In any case it definitely helps if you need to fit below a limit...
I don't know about the laws in your country, but from Her Majerty's Revenue & Customs (HMRC) here in UK, they
address the issue explicitly:
Make sure the supplier completes an accurate Customs Declaration
Goods arriving in the UK from outside the EU by post or courier must have a Customs Declaration fixed to the package - completed by the sender. The declaration should include:
a description of the goods
their value
whether they are gifts, commercial or personal items
Some websites will offer to show a value on the Customs Declaration that's much lower than the actual price paid so that you don't have to pay duty and/or VAT when the goods enter the UK. This is wrong: if you're ordering goods over the Internet, it is in your own interest to make sure that the sender abroad makes a complete and accurate declaration. If no declaration is made, or the information is inaccurate, the package may be delayed whilst the UK Border Agency makes further enquiries, or in some cases the package and its contents may be seized and as the importer of the goods you will be liable for any charges.
