Or they could read the forum description:
Quote:
If you have questions regarding non-default functionality of vBulletin prior to the purchase of a license, this is the place to get your answers. Questions regarding default vBulletin functionality or licensing and pricing should be asked on the Official company website: vBulletin Pre-sales Questions
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Also the sticked thread in the top of this forum would giove some clues

:
Pre-Sales Questions Regarding Purchase/Licensing