Inspect the evidence

Prices with a
traceable source.

Daily observed eBay sold prices, with current asking prices in a separate sample. Data through 2026-10-22.

What is collected

Each catalog reference has one daily sold query over a 90- or 365-day window. Daily queries now request up to 1,000 records; most of the first collection used a 200-record cap. Our filter requires the reference token, brand, USD price and a valid sale date inside that window. It rejects placeholder titles, prices outside the reference’s band, replica and custom/aftermarket listings. This is an observed sample, not a census of every sale.

What a reference includes

The base reference can include multiple dials, conditions and sets. Some Patek Philippe base references also combine material variants; those pages state that scope. A median describes that sample. The 25th to 75th percentiles describe its middle half.

Dates and history

“Data through” means the newest qualifying sale. “Collection checked” records the execution date. A failed or empty query does not invent a current sold estimate. Daily medians are calculated from recorded sale dates; historical observations remain stored as the current query window moves forward.

Asking prices and photos

The eBay Browse API provides a separate sample of live asking prices. The asking-versus-sold spread is a difference between those two samples, not a guaranteed discount. Representative listing photos come from a qualifying sold or live listing. Every reference photo links to its eBay source. Dial, material, condition and accessories can vary.

Comparisons and low-price signals

30- and 90-day changes compare medians of daily medians in seven-day periods. Both periods require at least three observed dates and five sales. A low-price signal needs a 90-day sample of at least 20 sales and at least three sales on the latest observed date. See the movers, returns and index calculation pages for their exact rules.

Open data

Inspect the reference index, catalog, and per-reference JSON linked from each permanent reference URL. Small-sample and empty reference pages remain accessible, but do not enter the sitemap until they have at least five qualifying sales.