I'm neutral with this.
I support because that sort of thing has happened to me before, even though it was only a minor inconvenience. I'm not really sure how to put my thoughts into words here...
Anyway, I would probably support completely if there was an option to turn this sort of thing off, because like RabbitWings said, some people do sell a lots of stuff in a day, and I know I don't exactly enjoy having my alerts spammed =P