It should however be GUILD fame, not the fame level of any individual player.
So even if the declaring player has 100 fame, if the guild only has 35 or so the price would be determined by that number.
Also, it should only affect the price the defender pays, the attacker should always pay the same (or in fact should pay more when attacking outside their homelands, as they'd have to effectively bribe npcs alligned with the target civilisation more to switch them).
IOW the system should be (if implemented) be the exact opposite of what you seem to propose, make defense cheaper and offense more expensive :)
So even if the declaring player has 100 fame, if the guild only has 35 or so the price would be determined by that number.
Also, it should only affect the price the defender pays, the attacker should always pay the same (or in fact should pay more when attacking outside their homelands, as they'd have to effectively bribe npcs alligned with the target civilisation more to switch them).
IOW the system should be (if implemented) be the exact opposite of what you seem to propose, make defense cheaper and offense more expensive :)