Hi JC,
If you're looking for Japanese made kits (Tamiya, Hasegawa, etc.) I'd highly recommend ordering from Japan from the likes of HLJ
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or R10
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before ordering from the U.S. This is because you'll be buying kits at U.S. prices rather then the much cheaper Japanese prices.
A 2kg SAL package from Japan only costs 2080yen ($25Cdn) for shipping and can hold 4 Tamiya 1/12 motocycle kits. However, bulky kits like 1/6 motorcycles can be very expensive to ship if they exceeds Small Packet limits. Then it better to order from within North America.
Since SAL is regular mail, there is no massive brokerage fees like with couriers. The only additional charge will be GST, PST and a $5 collection fee.
For example, if I bought 4 Tamiya 1/12 Honda RC211V kits here in Toronto it would cost $230 w/taxes, but if ordered from Japan it would cost just $150 in my hands. And maybe even just $130 if it escapes GST,PST, & $5 fee.
Once an order is shipped, I typically have it in about 9-11 days. And they will separate large orders into multiple SAL packages to keep shipping costs to a minimum.
Ken