Set and explain pre-sale estimates with comparable sales
When a consignor asks where an estimate came from, show them the sales. Lotbook builds a set of comparable auction results for each object, with sale dates, hammer prices, auction houses and source links, and exports charts and CSV for your catalogue notes and intake file.
Where it fits. Consignment intake: Screen what comes through the door and decide which sale, if any, each piece belongs in. Estimates: Start from a dated set of comparable results, then apply your specialists’ judgment. Consignor conversations: Send a chart of comparable sales with source links instead of a bare range. Catalogue notes: Export the CSV and keep the evidence with the lot file.
What each Lotbook case contains. Comparable auction sales: Each comparable shows its sale date, price, auction house and a link to the source listing. Prices stay in the source currency, and the price basis (hammer or with premium) is shown when the source records it. Match notes and limitations: Notes say why each sale was kept, and the packet states what the set cannot support, such as a thin market or a weak match. Charts you can export: Price and sales-over-time charts export as PNG, SVG, PDF or CSV. Enter your own figure to see where it sits among the sales. A PDF workfile: Every case produces a PDF workfile with the comparables, charts, notes and limitations. A saved research trail: Photos, notes and evidence stay on one case, so you can come back to it without starting over.
How it works. 1. Upload: Add photos of the object, plus maker, marks, size or provenance notes when you have them. 2. Review: Read the comparable sales, match notes and limitations. Keep what fits and set aside what does not. 3. Use: Export the charts or CSV, and keep the PDF workfile with the job.
Start free. The preview is anonymous and does not use a report credit. The 7-day trial includes 1 report and needs no card.
Limits. Lotbook is research. It does not sign, certify or state a value conclusion for you. Lotbook organizes the market evidence you choose to keep; you remain responsible for your report, your price and the standards that apply to them. Every comparable shows its sale date. Check how current the set is before you rely on it. Lot images are not always shown. Open the source link to see the original listing.
Questions
Does Lotbook set the estimate?
No. It assembles comparable sales with notes on how well each one matches. Your specialists set the estimate.
Where do the comparables come from?
Public auction records. Each comparable links to its source listing, so your team can check the lot before using it.
How current are the results?
Every comparable shows its sale date, so you can see how current the set is before you quote from it.
How many objects can I run?
The preview is anonymous and does not use a report credit. The 7-day trial includes 1 report and needs no card. After the trial, Core includes 100 Lotbook reports a month and Growth includes 1,000. Both can be billed monthly or annually; current prices are on the plans page.
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