Citroën GS Birotor

The Citroën GS Birotor sits at £27,750 in the UK market, based on a single transaction in the past year. With only 847 units produced, this rotary-engined variant represents a genuinely rare French classic—a machine that has largely disappeared from the road and from dealer stock.

The car holds "Holy Grail" collectibility status, a designation reserved for extremely scarce models with historical significance and engineering intrigue. Rotary-powered vehicles remain deeply niche, and Citroën's unconventional engineering approach in the 1970s ensures the GS Birotor will always command attention among specialists and museum curators.

Liquidity is essentially non-existent at present, with no active listings and only one recorded sale in our tracking window. This level of scarcity makes price discovery nearly impossible; any quoted valuation rests on that single transaction and carries substantial uncertainty.

The model's current desirability score—low—appears at odds with its Holy Grail status, likely reflecting weak buyer appetite relative to availability. The gap suggests that rarity and historical interest do not yet translate into sustained collector demand or a deep secondary market for these cars.

Without multiple recent transactions, projected valuations over three and five years cannot be reliably estimated. Future pricing will hinge on whether specialized collectors and Citroën enthusiasts begin actively seeking examples, and whether the rotary-engine renaissance in automotive culture gains real traction.