Among the items put up for auction at the “Collector's Photography” auctions one can find unique works by the best avant-garde artists: Stanisław Ignacy Witkiewicz, Zdzisław Beksiński, Natalia Lach-Lachowicz, Józef Robakowski, Zbigniew Libera, Aneta Grzeszykowska, Maurycy Gomulicki, Diana Lelonek.

Collectors often look for characteristic works by Witkacy, who created absurd scenes he invented in front of the camera. Desa Unicum also offers “Photomontages” by Aleksander Krzywobłocki, photo collages by Andrzej Różycki and numerous old photographs.