„Negotium“ recalls West’s „Otium“ and represents Ryslavy’s „Verkaufswerk“ number 23, 47 and 48. It is an artist’s book and simultaneously a “sales catalogue” of three Franz West works. The main interest is on number 23, „Immobiles Paßstück mit Kindersonnenbrille (in Polizeistubengrün)“, “Immobile Adaptive with Children’s Sunglasses (in police office green)” by Franz West. The work was signed by West in 1982 and dated “74 or 75” on the back. It consists of a light green pocket object of pressboard and cardboard, originally nailed to the wall. In the pocket is a dark green plastic folder which contains 20 Franz West collages, and children’s sunglasses with dark (plastic) lenses that are supposed to be worn while looking at the collages.