Individual Cards · Core Set 2021
Rookie Mistake 066/274 Core Set 2021 M21 Common
Common066/274·Released Jul 2020
Rookie Mistake is a common instant from Magic: The Gathering's Core Set 2021 (M21). A versatile blue card that offers tactical advantages in budget and casual decks. A solid collectible for set completists.✦ AI summary
Rookie MistakeCore Set 2021M21MTGCommon
How much is Rookie Mistake 066/274 Core Set 2021 M21 Common worth?
As of Aug 12, 2026, the market median price of Rookie Mistake 066/274 Core Set 2021 M21 Common is $1.78 on eBay. Across 7 price snapshots tracked by TCGKami, the average is $1.85, ranging from a low of $1.78 (Aug 12, 2026) to a high of $1.93 (Jun 18, 2026), a -6.5% change over the tracking period.
Market median$1.78
Average (tracked)$1.85
Low$1.78Aug 12, 2026
High$1.93Jun 18, 2026
Trend-6.5%
Snapshots7
Data updated Aug 12, 2026 · source: live eBay listings, aggregated by TCGKami
Live Listings
No listings found.
