Why would shipping be so much, though? If you're willing to piece out your Amiga you must be willing to get the motherboard out - just send the motherboard and shipping won't be too much.
Agreed. I've owned operated an international Amiga service centre for nearly 14 years and regularly have many customers from America. In fact a Kentucky customer's A3640 has just arrived in the workshop, the postage stamp reads US$14.63 and took 13 days for delivery.
Using USPS First-Class Package International Service, it costs around US$27 to send an A4000D main board (1.2kg) to NZ. See pricing
here.
Repair turnaround times are generally 5 to 7 days and includes a full test report, fully detailed and itemised list of work done, etc. All common parts are in stock for fast turnaround; stock levels and pricing
here. As an indication, most A4000D type repairs are around US$150, which includes parts, labour, full testing and return freight. Payment via PayPal is quick and easy.
It's not as hard or expensive as many folks perceive it to be.
Let me know if you'd like to know more.
http://amiga.serveftp.net