Dear
Egor_D, you want to help , but they do not even bother to indicate the size works . One can only assume that you do not know what size - one of the parameters that affect the price .
A. Zaslavsky confirmed his authorship of both works . While it appears that you have to be a very big fan of his , to buy the work , having little in common with what he was doing the last 30 years and that it is now valued .
But who knows ...