goat prices

My Grandparents-in-law have a neighbor who has goats that get on their rental feilds all the time and eat their crops (pesticides and all) this neighbor has been warned and it's come down to her rehoming them or they are going to sue for damages, because she refuses to repair her fencing and...

Hi, I am new to the goat world. I am wanting to get some goats soon here. what is a good price for them? I have someone local who is selling a 2y old saanen x boar doe and her 2 kid bucks, all for $650 is that a fair price?