Applicable to: 3-Star Champions after you have 20+ 5-Stars. Once you reach "Thronebreaker" or "Paragon" progression, 3-Stars become useless for content. If you have a 3-Star that is not a synergy god (e.g., not Heimdall, not Nick Fury), and you are desperate for a tiny amount of Tier 3 Basic ISO to finish leveling a 6-Star, selling a dupe 3-Star is technically efficient.
You get much better rewards (ISO-8, Gold, and Shards) by duplicating a Champion through crystals than you ever did by selling them. how to sell champions on marvel contest of champions
For advanced players, selling is rarely optimal. However, for early-to-mid-game players, strategic selling can accelerate progression. The Complete Guide to Selling Champions in Marvel
While you cannot sell a champion for Gold, you can "cash in" duplicate champions. Key Insight: For advanced players, selling is rarely
Many players sold low-tier (1-star to 4-star) champions for quick resources, only to find they were required for special content like Back Issues (Variants) or specific milestones later on. Economy Balance: