OH, I see, LOL then they should know dirty eggs doesn't affect hatching. I mean they get dirty, you can't really do much about it except to wipe them with a dry paper towel and try to get what you can, you don't ever want to wet it. Takes off the protective coating.
I read some of the comments to that ebayer and honestly she or he has a really bad attitude. I mean they get on the defensive side if ANYONE leaves a negative feedback, bad business practice.. personally, I would be thinking twice before buying from them, I mean instead of rectifying the negative feedback, they just immediately insult them and call them a scammer. As a seller myself, it's just not good business practice. You want your customers to come back, not chase them away..