The Arnold Karma-Flex 4x4 is a roll-film camera designed for the 4x4cm image format. It is a niche pre-war/mid-century European model rather than a mass-market product, which keeps it largely confined to specialist collector circles today.

Sales data for the Karma-Flex 4x4 is extremely thin: the only recorded UK auction hammer result is £340 in November 2018, so any current value estimate in 2026 must lean on that single data point. With one wholesale saleroom price on file and no recent comparables, what the camera sells for today depends heavily on condition, completeness and whether two interested collectors happen to be bidding on the same lot.