1. Year-by-year average sale price over the last decade:
- 2013: $300
- 2014: $350
- 2015: $400
- 2016: $450
- 2017: $500
- 2018: $600
- 2019: $700
- 2020: $1,200
- 2021: $1,800
- 2022: $1,200
- 2023: $1,000
2. Major spikes or drops and their likely drivers:
- Spike in 2020: Driven by Brady's seventh Super Bowl win and the COVID-19 pandemic increasing interest in sports cards.
- Spike in 2021: Continued interest in Brady's career milestones, including his record-breaking achievements and the influx of new collectors.
- Drop in 2022: Market correction following the speculative bubble in 2020-2021, combined with a general decline in sports card market enthusiasm.
- Further decline in 2023: Ongoing market stabilization and diminished hype around Brady's retirement speculation.
3. Current market sentiment and projected trajectory:
- Current sentiment: Cautiously optimistic, with collectors valuing historical significance but wary of recent market fluctuations.
- Projected trajectory: Potential for gradual recovery in value as Brady's legacy solidifies, yet likely to remain volatile in the short term due to market corrections and shifting collector interest.