# Comparable sale

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**Comparable sale:** A completed sale of the same item, at the same grade or at another grade adjusted to it, used to judge what another copy is worth.

## How we measure it

The card and comic value search (opening with the API) will use up to 20 recent same-grade sales of the same item and grading company, add other grades (price-adjusted to this grade by a fixed 1.5 times per grade point; for comics only grades within one point) only when fewer than three same-grade sales exist, and weight recent sales more.

## What it is not

A comparable sale is evidence, not a quote: the next copy can sell for more or less.

## Where it appears in the data

Field names as the API returns them; each dataset's page in the API lists the field's type and unit.

- `sold_date` in dataset `cards_auctions`
- `price` in dataset `cards_auctions`

## Related

- [Trading card sale prices: how we collect them](/methodology/trading-cards/)
- [All glossary terms](/glossary/)