If you were close and the pump was easy to get to it might be pretty cheap but who knows? I get 85.00 per hr. I just worked on a Ranger yesterday that the owner said needed the starboard livewell pump. Well I found 3 places where the wires had been attacked by rats and the pump was locked down from a valve that had come out of the control valve. It cost 340.00. It can get complicated answering your question. Normally if the pump motor is going bad it will start blowing the fuse for it.
“The world will not be destroyed by those who do evil, but by those who watch them without doing anything” GOD IS GOOD