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I've never honed a duck. But they are pricey, and with learning to hone, you will make mistakes and scratch the blade, scuff the scales, ...
't would be a shame to waste a duck.
Buy a good...

The thing with ebay specials is: you don't know what you'll get.
If a razor is really warped, it is normal that you won't get it shaveready if it is your first honing project.

Honing isn't rocket...