1. Year-by-year average sale price over the last decade:
- 2013: $120
- 2014: $130
- 2015: $150
- 2016: $180
- 2017: $200
- 2018: $250
- 2019: $275
- 2020: $300
- 2021: $350
- 2022: $325
- 2023: $350
2. Major spikes or drops and their likely drivers:
- 2018: Significant increase due to the 62nd anniversary of the set, coupled with the Hall of Fame induction of players featured in the set, particularly Mickey Mantle and Willie Mays.
- 2021: Another spike driven by the overall boom in sports card collecting, interest in vintage cards, and the impact of the COVID-19 pandemic prompting a surge in at-home hobbies.
- 2022: Slight drop attributed to market corrections after the peak in 2021 as collectors reassessed valuations post-boom.
3. Current market sentiment, projected trajectory, and notable players:
- Current market sentiment is bullish, with collectors showing strong interest in vintage cards, particularly high-grade examples from the set.
- Projected trajectory is stable to slightly upward as long-term investments continue to be favored for iconic sets like the 1956 Topps.
- Notable players include Mickey Mantle, Willie Mays, and Sandy Koufax, with Mantle cards commanding the highest values and consistent demand.