Turbo is $300 for the full service (P&P on both sides, thermal barrier coating on the turbine side and thermal dispersant coating on the compressor side). Not sure what shipping back to you would be... depends on the weight of the box.
What I would definitely recommend to you is to just send us the housings and you hang on to all of the rest of the turbo. That way you're shaving off a lot of weight, they can fit into a smaller box, and the chance of damage goes way, way down. It's REALLY easy to take apart a turbo and I'm happy to walk you through it if you would like. This way we can return ship it to you in a USPS Priority Flat Rate box and I believe international for that is $35.xx regardless of weight. The assembled turbo, however, will not fit in a flat rate box and it will definitely cost more than that.
Hope it helps. Shoot me an e-mail to CrucialRacing [at] Gmail.com if you'd like more information on sending it out!