How do you find the resell price?

Excuse me, could you please elaborate on how one goes about determining the resell price for a cryptocurrency or a financial asset? I understand that market conditions, supply and demand dynamics, and perhaps even the sentiment of investors play a significant role, but could you provide a more structured approach or any specific factors that should be taken into consideration when making such an assessment? I'm particularly interested in understanding how professionals in the industry typically approach this process.