i checked the secondary market for Firepower 3 days before the fight and the best seat was 45K+ and the next best was 25k+.... it was ridicuolusly high
Depends very much on the fight. Even for 'big fights' the range can be huge, particularly if the fight is a big draw to those outside the usual boxing fraternity. Could be anything from $500 to $20,000. For the very biggest fights it's probably on of those "if you need to ask, you can't afford it" things!