Here's one way to do it:
https://www.appraisaleconomics.com/sports-team-valuation-appraisal/
Coles' notes version - Over the past decade, MLB franchises have been sold for prices that equate to between approximately 1.5 and 3.0 times total revenue. Teams in larger metropolitan statistical areas (MSAs) with higher levels of average disposable income, lucrative long-term cable television contracts, and new stadiums where the team has significant rights to stadium income (naming rights fees, concession sales, etc.) will command multiples at the high end of the range. Conversely, teams in smaller MSAs, with less lucrative media rights contracts, and older stadiums, typically fetch multiples at the lower end of the range.