The ebay seller from the link in the original post says (via email) it's a drop ship straight from Behringer which makes makes me curious about what's in their dealer agreement. Seems like it's gonna be tough to maintain the value of their product if this is actually allowed.
I went to that listing and then looked at the seller's feedback. The only complaints about delivery were from buyers of Behringer products and that reinforces the drop-shipping.
The question that prospective buyers should be asking is "are you an authorized dealer?" If so, they're trying to minimize their inventory overhead by relying on manufacturer in-stock status. If they don't answer, my guess is they're gray market and placing orders through another dealer.