Price guide standards
Pricing Methodology
KpopPhotocard.com uses reviewed sold-listing evidence to estimate educational low, mid, and high price ranges for collectors. Final sale prices depend on condition, timing, region, demand, and seller behavior.
How prices are built
Research sold comps
We look for completed sales using card metadata, collector naming patterns, aliases, group, member, era, and card type.
Review the evidence
We check whether a listing appears to match the target card and filter out mismatches, bundles, bulk lots, and suspicious comps.
Keep accepted sales
Accepted sold listings become the evidence set. Outliers and rejected comps are separated from the range calculation.
Set the range
Low, mid, and high prices are set from the accepted evidence, with the mid price representing the typical supported sale.
Confidence score
The confidence score is a 0-100 signal based on evidence volume, listing match quality, price consistency, and outlier pressure.
Sample size
40 ptsMore accepted sold listings increase confidence. The sample-size portion maxes out at 15 accepted sales.
Match quality
30 ptsAccepted listings carry a match quality score. Confidence uses the average match quality across the evidence set.
Price spread
20 ptsTighter pricing earns the variance points. If standard deviation is more than 50% of the median, this portion drops to zero.
Outliers
10 ptsThe score rewards evidence sets where fewer matched listings had to be excluded as outliers.
Confidence tiers
Tiers summarize how much accepted evidence supports the range at a glance.
Low
Usually 1-3 accepted comps. Treat the range as thin evidence.
Medium
Usually 4-10 accepted comps. Stronger support, but still worth checking the spread.
High
Usually 10+ accepted comps. More repeat evidence behind the displayed range.
Liquidity notes
Liquidity labels explain how easy the card appears to price from recent activity.
Liquidity considers accepted sale count, price movement, premium pricing, and whether the evidence has a wide spread.
Sources and corrections
Source listings can disappear or change over time.
Marketplace listings and images may be used as linked evidence where available.
If you notice a stale range, incorrect image, broken source, missing card, or better sold-listing evidence, send a correction so the card can be reviewed.