A little doing this, my advice is:
Forget about UPS and DHL, the price is high and on our side there will be a lot of problems.
Ship only USPS mail American state. For international shipments they have three options: first-class, priority and express mail. First class is cheaper but is not tracked in Russia is not suitable.
Express on our side is transferred to EMS, the most expensive option, but not the best — actually the delivery time is almost reduced, plus they have their own customs post on which the thread packages less. Accordingly, the probability that will test you above.
The best option — USPS Priority mail. Of departure from the track on our side is delivered by regular mail to your office, value calculator is on the usps website.
Some tips: send to different recipients, each not more a couple times a month. In each parcel no more than 2-3 devices, on the Declaration of write used cellphone, broken phone for parts or similar. Labels iphone on the Declaration should not be. Accordingly, the estimate of$30-50.
Mark gift in the Declaration it is better not to specify.
Pack the devices well! So that box could play football. More pupyrchatoy film, double box.