I'm assuming ya mean
goldenmotor.com & I'm gonna move this thread to our S&S section as it's vendor review
I've very recently purchased a 'Magic Pie' hub motor, but before I did so I had that exact same question, wondering
why in heck the shipping cost so much... I mean I know electric motors can be heavy, batteries too - but it still seemed way more than it should be.
As it turns out - most/all of the vendors are still drop-shipping directly from China to your door and/or purchasing in very small quantities. So you're actually paying S&H from China, not jus' across the USofA. Interestingly - few to none of the domestic importers say as much, just tacking on the extra cost w/o explanation.
Somewhat irritated, I shopped around and found that the most forthright vendor is in Canada:
Golden Motor ebike Canada, while that means a lil more S&H, he's not only willing to tell ya what yer getting for the money, why it costs what it does - but he's extremely active on Golden Motor's support forum, helping with all sortsa Q&A:
goldenmotor.com - Index
Bear in mind that being a manufacturer's support forum, you'll get a disproportionate number of "problem" threads and complaints regarding customer service... or the lack thereof as the case may be. While this is no doubt a big problem with Golden Motor direct - I've found Gary (GM Canada) extremely helpful & easy to work with, his service & return reputation seems impeccable...
I can't attest to that personally nor the performance of my 'Pie as I've not completed the build yet, but I've had a few convos w/Gary while I was ordering the 'Pie and he really was quite helpful.