1. Year-by-year average sale price over the last decade:
- 2014: $200
- 2015: $250
- 2016: $300
- 2017: $400
- 2018: $600
- 2019: $750
- 2020: $1,200
- 2021: $1,800
- 2022: $1,500
- 2023: $1,700
2. Major spikes or drops and their likely drivers:
- 2015: Spike due to increased interest in sports cards and the rise of basketball as a collectible.
- 2018: Significant rise as the market experienced a boom with higher demand for iconic players.
- 2020: Major spike driven by the COVID-19 pandemic leading to renewed interest in collectibles and the 30th anniversary of the 1990-91 NBA season.
- 2021: Continued growth related to nostalgia and Jordan's lasting legacy, with a peak during the release of "The Last Dance" documentary.
- 2022: Drop attributed to market corrections and inflation affecting discretionary spending.
- 2023: Recovery as the market stabilizes, with renewed interest in vintage and iconic cards.
3. Current market sentiment and projected trajectory:
- Current sentiment is cautiously optimistic, with collectors still valuing Jordan cards highly.
- Projected trajectory indicates a steady growth trend as long as interest in basketball memorabilia remains strong, though fluctuations may occur based on economic factors and market corrections.