"Pulse Rifle" may be a copyrighted name, and/or you may have used Aliens, Colonial Space Marines, etc in the description, tipping the copyright police.
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Hadleys Hope is right, your account will have been flagged and they'll be checking.
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One technique that seems to work but limits the exposure of your auction is to list it on Friday evening and only run it for 3 days. Less chance to be vero'd... People selling Trek items have been doing it for years. Not 100% effective but works more often than not.
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