A used Brompton sells for close to a thousand euro. Very few things you buy and actually use will hand that much money back years later.
That is the whole case for the C Line. It is a folding bike, hinged in three places, built in west London on a design that has barely changed since 1988. The steel frame is brazed by hand and stamped with the builder's mark. Because the shape stayed still, the parts stayed compatible. Brompton sells almost every component as a loose spare, so a hinge, a chain tensioner or a folding pedal is a small order and an evening at the workbench rather than a new bike. Register the frame and it carries a seven-year warranty. Ride it daily and it folds into a parcel you carry onto a train, which is the reason people keep them for a decade or more.
The money is where it gets interesting. A base C Line costs around €1.699 new. A budget folding bike from a webshop costs €249, and for the first four years the cheap one wins on cash outright. Then the bearings loosen, the folding joint develops play, the finish rusts through a Dutch winter, and it goes to the tip worth nothing. Buy it three times across twelve years and you have spent roughly €747 on bikes that no longer exist.
The Brompton spends the same twelve years appreciating in usefulness and holding its price. The Dutch used market pays an average of around €990 for a second-hand one, and clean examples clear a thousand. Your net cost of ownership is the gap between what you paid and what you can get back.
| Brompton C Line | Budget folding bike | |
|---|---|---|
| New price | €1.699 | €249 |
| Lifespan | decades, every part sold separately | about four years to play and rust |
| Bought over twelve years | one | three, about €747 |
| Resale | around €1.000 used | €0 |
| Net after twelve years | about €700, and still a sellable asset | about €747, gone |
The two paths cost almost the same in cash. One of them leaves you holding a liquid asset the entire time, one you can sell in an afternoon on Marktplaats to a queue of buyers. The other leaves you with a memory of three bikes and a landfill receipt.
A Brompton also earns its patina. The lacquer softens and the saddle darkens, and the hinges wear to match your own fold. That history is exactly what the used buyer is paying for, which is why the resale floor holds while a plastic-geared folder depreciates to scrap.
Buy the Brompton once, ride it for a decade, and the used market hands most of your money back.