Yes, product availability.

Posting guidelines Section 8:

share a product that is no longer available (except for pre-order stage).

If there’s even no pre-order stage yet... it’s just a mailer signup. We do not feature mailing lists. Anybody can build a nice website, but a website doth not make a product. It’s that simple.

As hinted at in my initial comment: hunt it when the kickstarter campaign starts.