From personal:
DHL - expensive, delivery time 10 days in the center of Russia, if an invoice (with the "blue" seal) to the picture attached to the packaging by the seller, in the post Moscow 3 do not even look visually, just scan, the agent arrives at the recipient's account with TD and on payment of customs duties. Pay bills, now take off.
FedEx-expensive, delivery 10 days - then just as at DHL /
DHL Germany - cheap, delivery 30-40 days, the customs clearance office at Moscow on 3, if an invoice with a blue stamp affixed on the package or affixed, packing reveal wait staff rossohrankultury 90%of the pass (za.b.. Tinued wait staff rossohrankultury) and if the officer arrived and saw the Rembrandt painting for $ 300 USD send a picture at the customs post of the recipient's premises, via the Russian Post Office, then you get the picture response to the store, going to Rossohrankulturu where you pay for the conclusion and, if accepted cultural values that are going to receive permission to TD and issue, and if recognized cultural goods are going to get TD and an invoice for payment, pay for your painting.
In short, for the customs importantly Confirming document INVOICE so luchsche agree with gruzotpravitelem!