Thank you all for your answers!
I do not understand the multiple collectibles, because I have them some obscure antipathy . Stated as litograph offset. On the formation of prices for them, I imagine . But the fact that there is no auction sale with the image, and the original is in a museum - it's tempting to some bad ideas .
The dealer , by the way from Italy.
Link to archive fund of Liechtenstein
And here
article on the topic
What are your thoughts ?