The CP Score

The CollectorPursuit Score is a running measure of how collectable an item is. Every item gets a permanent ID, and the score follows that exact item through every sale, so collectors can see its scarcity, demand and price history in one place.

Why it matters

Most price guides show averages for a type of item. The CP Score tracks the same individual item over time. A documented history of rising demand and limited supply makes an item more desirable to collectors, and gives buyers more confidence in what they're paying for.

How it's calculated

The CollectorPursuit Score is an unbounded, living collectability metric based on collector demand, scarcity (production plus what remains in the market), market velocity, and the cumulative points from unique attributes. Condition and recognized certification or grading also contribute.

Collector demand

How large and active the community of collectors for this item is.

Scarcity

How many were produced and how many remain available in the market.

Market velocity

How actively this item and its niche are selling.

Unique attributes

Category-specific varieties, errors and special features, each worth points.

Condition

Exceptional condition lifts the score; poor condition lowers it.

Certification & grading

Recognized third-party certification and grades add confidence and value.

Attribute scoring is category-specific and grows as experts contribute data. The exact weighting and attribute tables are proprietary and are updated as the database expands. Each item's scorecard shows a clear summary of where it stands, such as "Scarcity: High · Velocity: Moderate · Unique attributes: 12 points".

The CP Score scale

Most items score between 100 and 1000. The scale is open-ended, so truly exceptional pieces can go well beyond 2000.

1–99CommonEasily available, high survival numbers
100–299ScarceHarder to find in top condition, lower numbers
300–999RareDifficult to acquire, limited known specimens
1000–1999Very Rare to Extremely RareMuseum or auction-grade scarcity
2000+UniqueOnly one single example is known to exist in the entire world

How other rarity scales compare

  • Traditional R-1 to R-10: R-1 Common · R-2–3 Scarce · R-4–6 Rare · R-7–9 Very/Extremely Rare · R-10 Unique
  • Sheldon (coins): R-1–2 Common · R-3 Scarce · R-4–5 Rare · R-6–7 Very/Extremely Rare · R-8 Unique
  • Universal Rarity Scale (URS): URS-11+ Common · URS-7–10 Scarce · URS-4–6 Rare · URS-2–3 Very/Extremely Rare · URS-1 Unique
  • Trading card tiers: Common/Uncommon Common · Rare Scarce · Double/Ultra Rare Rare · Secret/Hyper Rare Very Rare
  • Toy & diecast availability 1–10: Same as the Traditional R-1 to R-10 scale

How it changes over time

  • Each recorded sale of the item adds to its history and raises its turnover score.
  • Busy markets in the item's niche lift turnover; quiet markets let it drift down.
  • As supply dries up or collector interest grows, the research factors rise on recalculation.
  • Estimated market value follows the item's own sale prices, or similar items in the same condition.
  • Every recalculation is saved, so the scorecard shows the full score history.

Scores shown in the free tools and previews are quick estimates. Saved items get a full scorecard that improves with every sale.

CP Scores and estimated market values are estimates only, based on available sales data and AI research. They are not appraisals or guarantees of value.