I would go quite a long way for a NOS 56cm System Six frame.
https://www.ebay.co.uk/itm/NOS-CANNONDALE-SYSTEM-SIX-ALLOY-CARBON-ROAD-BIKE-FRAME-SET-56-CM-/283152658516
Wrong colour though
@PhilDAS started
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I would go quite a long way for a NOS 56cm System Six frame.