I'm not sure if you're talking about International wires or domestic American wires (I have no knowledge of the latter.) However international wires are expensive, but it varies between banks.
There are at least three types of SWIFT wires you can do, Fast, Medium and Slow... not sure if those are the names for them but they all carry a different price tag.
Bank charges for sending wires varies for me from 10$ to 50$... (The 50$ one is an American bank, the 10$ is an Icelandic bank).
Just for information
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