I have been using Pirate Ship for shipping parts for several years as they offer the best discounts without any added fees. I noticed one of our members business account from UPS was $30 more (large but lightweight box at $90 his cost) than my cost to ship him the same package ($60 my cost) so I dug into if Pirate Ship has any fees for businesses, and it looks like they do NOT charge any fees, even for small businesses. This is a good option to consider for those of you with a small business that ships stuff to customers.
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