Shipito is one of the leading freight forwarders in the USA using USPS (United States Postal Service).

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Examples of fees charged by USPS Express Mail and Shipito shipping forwarder in 2013 for sending packages from the United States to Russia
Examples of fees charged by USPS Express Mail and Shipito shipping forwarder in 2012 for sending packages from USA to Russian Federation
Some samples on how much it costs to send packages/parcels to Russia using USPS and Shipito (2010-2011)