Please be aware that:
No legitimate company will use bank accounts of private individuals for processing payments from its customers.
No legitimate business will pay 5% and more for international money transfers (for example, $250 out of $5000), when banks provide such services for only $30-50 per transaction and businesses and individuals can set up their own bank accounts in other countries if needed.
No legitimate company uses private individuals to receive parcels and remail them.
Probably sending in more than 10K and sending out smaller amounts to leave you with the tax bill since 10K+ are reported directly to the IRS.