Follow the Market. Know Your Bottles.
Bourboneur’s proprietary Bourboneur Secondary Market Index (BSMI) tracks broader price movement in the bourbon secondary market, giving collectors a daily view of market direction.
But the market trend is only part of the picture. Individual bottles can rise, fall, or hold their value as supply and demand change.
Use the BSMI to follow the market—and the Bourbon Blue Book® to see what those trends mean for the bottles you own or want to buy.
The Bottle Hasn't Changed. The Price Has.
Weller Single Barrel’s Bourbon Blue Book® value fell from $439 to $167—a 62% decline between November 2024 and October 2026.
A bottle’s reputation can outlast its price premium. Check today’s value before you buy.
Analysis Behind the Numbers
Explore Our Market Reports
Bourbon's Secondary Market Is Becoming a Data Story
Bourboneur’s approach to bourbon valuation has earned recognition from Forbes, highlighting the growing importance of data and transparency in the collectible bourbon market.
Data Is More Useful When You Know What You're Looking At
Average Price
The current market value based on tracked secondary transactions.
High and Low
The range of observed pricing that helps put today's value into context.
Trending Up
The direction a bottle's value has been moving over time.
Price Discovery
The process through which a new release establishes its market value as buyers and sellers begin trading.
Market Momentum
The strength and consistency of recent price movement.
BSMI
The broader benchmark showing how a curated basket of collectible bourbon is performing over time.