Documentation is a third of the price
A car with a build sheet, a window sticker, stamped service books and a folder of invoices sells for substantially more than the same car without them. The paperwork is not sentimental — it is the only evidence that the engine in the bay is the engine that left the factory, and numbers-matching is where the money is.
When a catalogue says 'believed original', read it as 'undocumented'. That belief is worth nothing at resale.
Originality beats restoration, until it doesn't
The market has spent two decades moving toward unrestored survivors. A car with honest patina and original paint can outsell a glossy rotisserie restoration of the same model, because paint can be redone and originality cannot be put back.
The exception is structural. Rust in the floors and sills is not patina; it is a restoration bill with a car attached.
Rarity only pays when somebody wants it
Low production numbers raise prices only where there is an existing community chasing the model. A rare trim of a car nobody collects is simply a car that is hard to find parts for.
- Desirable engine and transmission combinations
- Factory options that enthusiasts actually chase
- Colour: the right period colour can add double digits in percent
- Known ownership history, especially single-owner cars
- Matching numbers, with documents to prove it
Buy the best example you can afford
The cheapest car in a model range is cheap for reasons that will cost more to fix than the gap in price. On anything older than thirty years, the gap between a good one and a project is far narrower than the gap between a good one and a finished project.
From the auction floor
See how this works on a real lot.
Every listing carries its inspection report, its full specification and its bid history. Read one before you decide what it is worth to you.