The Dubroni No.3 is a 19th-century French wet-plate collodion camera, one of a series of small self-contained cameras produced by Dubroni in Paris that allowed the photographer to sensitise, expose and develop a plate inside the camera body itself. It is a collector's item rather than a working tool, valued today for its place in early photographic history.

At UK auction the Dubroni No.3 has produced hammer prices in a wide range, with two recorded results of £1,375 (2003) and £2,200 (2019), giving a midpoint around £1,800. With so few public sales, what a Dubroni No.3 is worth in 2026 depends heavily on completeness of the original outfit, condition of the internal glass vessel, and presence of period accessories, and saleroom results can swing well outside that range.