For current model lines a dismantler competes with new-parts trade and replicas. For vehicles whose spare-parts supply has ended, they compete with nobody. There the used part is not the cheaper option but the only one — and the price follows availability rather than the new price.
Where the data ends
The data models of the independent aftermarket are built for the current vehicle population. The older a model line, the patchier the linkages, cross references and article assignments become — see TecDoc: the data model behind the independent aftermarket. On very old vehicles the vehicle type itself is often missing from the catalogue.
The same gap applies to vehicle identification: a VIN of older construction may not even have 17 characters, because the standardised format only applies from the 1980s. What follows is not an excuse but a working instruction: what the sources do not yield is not filled in but replaced by your own statements.
How to describe parts without a catalogue entry
- The number on the part. On older vehicles it is often cast in and therefore better preserved than any label. It is the most dependable statement of all.
- The donor vehicle. Make, model line, build period, engine, body style — the more precise, the more findable.
- The mounting position. Front or rear, left or right, with or without a particular feature.
- Dimensions. On parts without a number, length, hole spacing and connection sizes are the substitute buyers compare with.
- Images from several angles. On classic parts the buyer checks visually, because that is what they are used to — see Part photography: how images sell used parts.
What sets the price
| Factor | Effect |
|---|---|
| Availability | The strongest factor. No competing offer means no price anchor |
| Condition | More important than on new parts, because rework is often planned in |
| Originality | On enthusiast vehicles an original part is a value in itself |
| Completeness | Small parts, bolts and brackets are missing from the market more often than the main item |
| Reproduction | Where a reproduction exists, the price anchor is back |
That last row is why blanket pricing rules for old parts cannot be set. Some model lines have lively reproduction markets, others nothing. It can only be observed per product group — and your own sales history is the most reliable source for it, see Vehicle purchasing: what an end-of-life vehicle is really worth.
What runs differently in the business
- Longer time on shelf. A part for a rare model line finds its buyer, but not this week. That is a calculation question, not a quality one.
- A different clientele. Restorers and enthusiasts ask more precisely and accept more effort — and expect precise data in return.
- A wider catchment. For rare parts distance is no obstacle; cross-border shipping is normal.
- More description effort per part. Worth it here, because the revenue per part is higher.
Frequently asked
Why can I find no parts data for older vehicles?
Because the data models of the free market are maintained for the current vehicle population. Linkages and cross references thin out with the age of the model line.
How do I describe a part without a catalogue entry?
Via the number on the part, the donor vehicle, the mounting position, dimensions and images from several angles. That replaces the catalogue entry for the buyer.
Do classic vehicles always have 17-character VINs?
No. The standardised 17-character format only applies from the 1980s. Older vehicles carry deviating number formats.
Is detailed capture worth it on rare parts?
Especially there. Revenue per part is higher and competition lower — and without a precise description the part appears in no search.