The unit price on an overseas quote is the easy number to compare, which is usually why it is the only one compared. The costs that decide whether the decision saved money show up later, and they land in other budgets.
What the quote leaves out
Ocean freight moves with fuel prices and container availability. Tariff exposure changes with trade policy and is not something you control. A twelve-week lead time turns an ordinary stockout into a line-down event. A quality escape found at incoming inspection is expensive, and the same escape found by your customer is worse.
Where domestic is genuinely different
Ground freight on a predictable schedule, no port delay, no duty surprise, and a lead time you can check by calling the plant. None of that is free, and the unit price will often be higher.
Being honest about it
Offshore is sometimes the right answer. High volume, a simple part, stable demand, and no regulatory exposure can all favor it. The cases where it does not tend to be low-volume parts, parts with tight quality requirements, and parts where a stockout stops a line.
If you are looking at an existing overseas part, the useful first step is measuring what you already have. We characterize the incumbent part in our lab before quoting, so the comparison runs against real properties rather than a datasheet nobody can produce.