What deep time
sells for.

Price evolution

A size- and quality-adjusted price index per fossil type (hedonic regression), indexed to 100 at each series' first period. Unlike $/inch, this isolates real price movement from changes in size and quality mix — so the lines show how each type actually appreciated, on a common scale. Switch to Standard specimen $ to read the fitted dollar price of a median-sized, clean specimen of each type over time. Most lines are quarterly; thin-but-tradeable series (e.g. T. rex teeth) fall back to an annual index, marked in the legend. Single-species lines are most reliable; "(various)" groups, annual lines, and pre-2023 levels (from archived listings that captured only top-priced items) are noisier — read those as indicative.

Fossil valuation

Describe your fossil and we'll appraise it against every sale we've tracked — the same size-, condition-, and variety-adjusted model behind the Deal Finder. Asking-price based; a fast private sale usually lands below the low end.

Closest tracked specimens

Deal finder

Pick a fossil type. We fit the market's price-vs-size curve from every sale we've seen (adjusting for size, completeness, skeletal element, and variety), then rank what's listed right now by how far it sits below that typical price.

On the market now — best deals first