Originally Posted by Lucille

I agree.

And even though the onus is on the seller, everyone makes mistakes. Here, I think the real problem is not that the seller made a mistake in sexing, it is his poor communication and refusal to address the issue.
And to me, that is a more serious problem than a sexing error, because it means that future buyers from this seller may have the same issue, that any problems or errors in the sale will not be addressed.
A mis-sexing does not make a Bad Guy. An ignored customer when there are genuine issues does.