1. Year-by-year average sale price over the last decade:
- 2020: $3,000
- 2021: $5,500
- 2022: $4,000
- 2023: $6,000
2. Major spikes or drops and their likely drivers:
- Late 2020: Initial release hype and Herbert's strong rookie performance.
- Early 2021: Surge due to Herbert winning the NFL Offensive Rookie of the Year award.
- Mid-2021: Drop attributed to general market cooldown and increased supply of graded cards.
- Late 2021 to early 2022: Price spike driven by Herbert’s continued growth and the Chargers' improved performance.
- Mid-2022: Price drop due to overall market correction and economic factors.
- Late 2022 to 2023: Increased interest as Herbert becomes a recognized star, leading to a rise in prices.
3. Current market sentiment and projected trajectory:
- Current sentiment: Positive, with strong demand for Herbert cards as he is seen as a key player in the league.
- Projected trajectory: Expected to continue rising, especially if he performs well in upcoming seasons and leads the Chargers to playoff success.