Just bought a “new” breaker from Canada Breakers and its condition doesn’t exactly instill confidence. It looks dusty and used. The silver contacts are not shiny and have a matte white coating on them (I suspect oxidation?). Is this normal?
If that's a squareD breaker like I think it is, hard no. They come with blue tape over that side that pulls apart as a security device to show it's been opened, but the tape is entirely gone, so it's been cleaned off with a solvent and repackaged. That being said, breakers don't tend to fail unless some moron tampered with the internals.