CardGameInsight
PokémonPromo

Tropical Beach

BW Black Star Promos · #BW50 · 2011

Blended market value

$68.96modelled+1.6% 30d

Modelled headline · 3 estimator sources · updated 5d ago

Price history

2026-10-142026-10-24

Latest

$68.96

Average per source

  • TCGplayermodelled

    32 listings · Raw · Near Mint · 5d ago

    $64.27

    median $62.34

    $57.20–$74.17

  • PriceChartingmodelled

    12 listings · Raw · Near Mint · 5d ago

    $75.30

    median $73.04

    $70.03–$82.68

  • eBaymodelled

    41 listings · Raw · Near Mint · 5d ago

    $67.62

    median $65.59

    $53.42–$87.50

The headline is the built-in estimator's number: no live marketplace read carries weight for this condition yet. Rows marked modelled are that estimator, not a marketplace read; the first live read replaces them in the headline. Observed rows marked not blended are regional asks or mixed-condition sales, shown but never averaged into the US near-mint figure.

  • No population read for this card yet, so it is outside the pop-adjusted and drawdown screens.
  • Chase concentrationBW Black Star Promos: top-3 share 100% · HHI 0.5464% of set value#1 card in the set

    BW Black Star Promos's cards sum to $108 over 101 cards; this card is 64% of that as its #1 card, and the top 3 together hold 100% (HHI 0.54, where 1.0 would be one card being the whole set). The set is not ranked yet: 0 of 101 cards have an observed price.

Terms used above
PSA 10 pop
The number of copies PSA has graded a 10, read by hand from public GemRate-sourced reports on a stated date.
thin comp
An observed PSA 10 price built on fewer than three eBay sales, or one the source flags as an outlier. It is in the fit, but it is one comp, not a market.
slope
b in the era's fit ln(price) = a + b · ln(pop). Negative: scarcer cards cost more. Positive: the most-graded cards cost most, so population is tracking demand rather than scarcity.
float
PSA 10 price × PSA 10 population: the market value of every PSA 10 of the card in existence. A small float is a thin market in both directions.
HHI
Herfindahl–Hirschman index: the sum of every card's squared share of the set's value, from near 0 (value spread evenly) to 1.0 (one card is the whole set).
spread
Tradera median in dollars ÷ US market − 1. Negative means the Swedish asks sit below the US near-mint market, before postage, VAT and duty, none of which is subtracted.
asks, not sales
Tradera figures are live asking prices (plus bids on auctions closing within a day), not completed sales. An ask nobody meets is not a price, and asks run above what sells.

Card details

Set
BW Black Star Promos
Era
Black & White
Number
BW50/101
Rarity
Promo
Artist
Naoki Saito
Released
Mar 1, 2011

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