Depending on your credit and your countries rules, will determine the payment rules.
Credit is available in some countries.
Other forms of payments are also available.
30% deposit, balance at time of shipping

PIA – Payment in advance

Letter of credit – A documentary credit confirmed by a bank, often used for export

Bill of exchange – A promise to pay at a later date, usually supported by a bank

CND – Cash next delivery

CBS – Cash before shipment

CIA – Cash in advance

CWO – Cash with order

Stage payment – Payment of agreed amounts at stage