Price Estimation Methodology
Last Updated: December 15, 2024
Data Sources
- eBay Sold Listings: 70% weight - Median prices from completed sales over past 90 days
- Mercari Sales: 20% weight - Recent transaction data
- Collector Forums: 10% weight - Community-reported values
Calculation Process
- Data Collection: Automated scraping of sold listings every 24 hours
- Sample Size: Minimum 10 sales required for price estimate
- Outlier Filtering: Remove top/bottom 10% of prices to eliminate anomalies
- Currency Conversion: All international sales converted to USD using daily exchange rates
- Condition Adjustment: Prices adjusted based on item condition using multipliers:
- Mint in Package: 2.0x base value
- Loose Mint: 1.5x base value
- Good: 1.0x base value
- Played With: 0.5x base value
Quality Assurance
- Manual review of high-value items ($50+)
- Cross-reference with multiple platforms
- Community feedback integration
- Regular algorithm updates based on market trends
Limitations
Price estimates are directional and for reference only. Actual market values may vary based on:
- Regional market differences
- Seasonal demand fluctuations
- Specific packaging variations
- Authentication status