The Graflex Series B is an American-made single-lens reflex roll/sheet film camera from the early 20th century, produced as part of Graflex's line of large-format reflex press and field cameras. It was positioned as a smaller, more portable alternative within the Graflex SLR range when new.

Sales data for the Series B is very thin: a single UK auction hammer result from February 2025 saw an example sell for £38, so today's wholesale saleroom level appears to sit in the low double figures. With only one data point it is difficult to define a reliable price band, and what a Series B is worth in 2026 will depend heavily on condition, completeness of the lens and back, and whether the bellows and shutter are functional.