We definitely do! As much as possible, we ship everything in USPS flat rate priority mail boxes. This saves on customs duties for our customers.
As to cost, a large flat rate box to Canada or Mexico is around $60, and anywhere else in the world is $78, while a medium flat rate box (suitable for smaller orders, such as 2-3 R&P units) costs approximately $60. Orders over 20 lbs will take multiple boxes, which will be in these increments.
Want an accurate quote? Just create a cart and start the checkout process. You will have the opportunity to review shipping costs prior to placing your order. In some cases, only UPS will be listed as an option due to odd lengths and sizes that the USPS calculator can't reconcile on its own. In this case, feel free to contact us and we can put together a custom shipping quote.
Unfortunately, some of our larger machine kits cannot currently be economically shipped via standard courier service. However, we can typically ship these via air freight to your nearest major airport -- let us know which airport is closest to you, and we can usually get a reliable quote within a day or two.