nope, if they can prove they mean serious business, and have actually a product which is not some old product with some paintjob over it, then we can at least start putting a valuation on this product
the fact that they refuse to show anything, even though (as was pointed out here) it literally takes 5 minutes to post a picture on a website, is a big red flag.
and don't come again with this text that "due to a competitive business segment, they will not always be able to disclose what is going on and bla bla because the enemy is listening"
how hard could it be to
a) show some pics of the cebit stand and the product
b) show a pic of the product ?
c) show a pic of that warehouse ?
that is not exactly going to give their competitors a big edge and trade secret, is it ?