I bought 4 of these packs the other day and I have never seen a pack of these ever at the shop or even at a major show.
I haven't decided if I am going to sell them yet. As for value, I suspect that these are pretty common notes but in the pack like that I suspect that they will command some premium.
Love them! If you decide to open a pack I hope you keep us in mind. I do have to agree with the others though that they are kind of cool in a pack!
Your title seems to say each pack contains 20,000 notes for a total of 20-million marks, but they don't seem to be from the hyper-inflationary era, and the bands say each pack has 20 notes totalling 20,000 marks. So what do you have????