To determine the value of an airdrop token, first look into the project’s whitepaper and roadmap to see if the token serves a real need. Review the credibility of the team and their previous successes in the blockchain space. Examine the token's trading activity on exchanges to gauge its market interest and liquidity. Additionally, consider the token’s total supply and circulating supply, as scarcity can influence its value. A solid project with a functional use case, experienced team, and a growing community has greater potential for future value.