How PlateIndex Works
From auction data to actionable insights in 7 steps
Data Collection
We monitor Australian auction houses and verified brokers for heritage plate sales.
- Real-time monitoring of major auction houses
- Verified broker transaction data
- Historical archive dating back to 2015
Heritage Filtering & Normalization
Only Victorian heritage plates are included. Data is cleaned and standardized.
- Filter non-heritage custom plates
- Normalize plate number formats
- Standardize currency and dates
Pattern Detection
Our algorithm identifies 8 distinct pattern types that drive collector value.
- Palindrome, Sequential, Lucky 8s
- Low Number, Triple, Double
- Bookend, Mirror patterns
Rarity Calculation
Each plate receives a 0-100 rarity score based on multiple factors.
- Pattern type weighting (35%)
- Digit count analysis (25%)
- Number value scoring (20%)
- Market activity (20%)
Price Analytics
We calculate medians, trends, and comparable plates for each number.
- Median price calculation
- Trend analysis (3m, 6m, 12m)
- Comparable plate matching
Confidence Scoring
Every result includes a confidence level based on data quality.
- High: 20+ sales, 80%+ auction data
- Medium: 10+ sales, 50%+ auction data
- Low: Limited data available
Daily Updates
Our database is refreshed daily with new sales and market data.
- New sales added within 24 hours
- Price recalculations nightly
- Trend updates weekly
Try the Pattern Detector
Type any plate number to see what patterns are detected automatically
1 pattern detected:
Reads the same forwards and backwards
Examples: 121, 12321, 456654
Try these examples:
Ready to Try It?
Search any Victorian heritage plate and see real market data instantly.