WorthPoint

It collects records from online marketplaces and auction houses, with photos and descriptions of sold items. Image search can help identify an object from a photo. Subscribers use the data to price inventory, decide on consignments, and verify values.

Prices come from sales records, so rare or unusual items may have few comparables. It is a research aid and does not replace a professional appraisal.

LiveAuctioneers and Invaluable show auction results too. WorthPoint suits antique dealers, pickers, and appraisers.